Here are some verses that might help.
Gen 6:5 "And God saw that the wickedness of man was great in the earth, and that every imagination of the thoughts of his heart was only evil continually."
Gen 8:21 "And the LORD smelled a sweet savour; and the LORD said in his heart, I will not again curse the ground any more for man's sake; for the imagination of man's heart is evil from his youth; neither will I again smite any more every thing living, as I have done."
Job 14:4 "Who can bring a clean thing out of an unclean? not one."
Job 25:4-6 "How then can man be justified with God? or how can he be clean that is born of a woman? 5 Behold even to the moon, and it shineth not; yea, the stars are not pure in his sight. 6 How much less man, that is a worm? and the son of man, which is a worm?"
Psa 14:1-3 "To the chief Musician, A Psalm of David. The fool hath said in his heart, There is no God. They are corrupt, they have done abominable works, there is none that doeth good. 2 The LORD looked down from heaven upon the children of men, to see if there were any that did understand, and seek God. 3 They are all gone aside, they are all together become filthy: there is none that doeth good, no, not one."
Psa 51:5 "Behold, I was shapen in iniquity, and in sin did my mother conceive me."
Psa 53:1-3 "To the chief Musician upon Mahalath, Maschil, A Psalm of David. The fool hath said in his heart, There is no God. Corrupt are they, and have done abominable iniquity: there is none that doeth good. 2 God looked down from heaven upon the children of men, to see if there were any that did understand, that did seek God. 3 Every one of them is gone back: they are altogether become filthy; there is none that doeth good, no, not one."
Psa 58:3 "The wicked are estranged from the womb: they go astray as soon as they be born, speaking lies."
Isa 64:7 "And there is none that calleth upon thy name, that stirreth up himself to take hold of thee: for thou hast hid thy face from us, and hast consumed us, because of our iniquities."
Jer 13:23 "Can the Ethiopian change his skin, or the leopard his spots? then may ye also do good, that are accustomed to do evil."
Mat 7:17-20 "Even so every good tree bringeth forth good fruit; but a corrupt tree bringeth forth evil fruit. 18 A good tree cannot bring forth evil fruit, neither can a corrupt tree bring forth good fruit. 19 Every tree that bringeth not forth good fruit is hewn down, and cast into the fire. 20 Wherefore by their fruits ye shall know them."
Mat 12:34-35 "O generation of vipers, how can ye, being evil, speak good things? for out of the abundance of the heart the mouth speaketh. 35 A good man out of the good treasure of the heart bringeth forth good things: and an evil man out of the evil treasure bringeth forth evil things."
Mat 15:19 "For out of the heart proceed evil thoughts, murders, adulteries, fornications, thefts, false witness, blasphemies:"
John 3:19 "And this is the condemnation, that light is come into the world, and men loved darkness rather than light, because their deeds were evil."
John 6:44-45 "No man can come to me, except the Father which hath sent me draw him: and I will raise him up at the last day. 45 It is written in the prophets, And they shall be all taught of God. Every man therefore that hath heard, and hath learned of the Father, cometh unto me."
John 6:63-65 "It is the spirit that quickeneth; the flesh profiteth nothing: the words that I speak unto you, they are spirit, and they are life. 64 But there are some of you that believe not. For Jesus knew from the beginning who they were that believed not, and who should betray him. 65 And he said, Therefore said I unto you, that no man can come unto me, except it were given unto him of my Father."
John 8:30-47 "As he spake these words, many believed on him. 31 Then said Jesus to those Jews which believed on him, If ye continue in my word, then are ye my disciples indeed; 32 And ye shall know the truth, and the truth shall make you free. 33 They answered him, We be Abraham's seed, and were never in bondage to any man: how sayest thou, Ye shall be made free? 34 Jesus answered them, Verily, verily, I say unto you, Whosoever committeth sin is the servant of sin. 35 And the servant abideth not in the house for ever: but the Son abideth ever. 36 If the Son therefore shall make you free, ye shall be free indeed. 37 I know that ye are Abraham's seed; but ye seek to kill me, because my word hath no place in you. 38 I speak that which I have seen with my Father: and ye do that which ye have seen with your father. 39 They answered and said unto him, Abraham is our father. Jesus saith unto them, If ye were Abraham's children, ye would do the works of Abraham. 40 But now ye seek to kill me, a man that hath told you the truth, which I have heard of God: this did not Abraham. 41 Ye do the deeds of your father. Then said they to him, We be not born of fornication; we have one Father, even God. 42 Jesus said unto them, If God were your Father, ye would love me: for I proceeded forth and came from God; neither came I of myself, but he sent me. 43 Why do ye not understand my speech? even because ye cannot hear my word. 44 Ye are of your father the devil, and the lusts of your father ye will do. He was a murderer from the beginning, and abode not in the truth, because there is no truth in him. When he speaketh a lie, he speaketh of his own: for he is a liar, and the father of it. 45 And because I tell you the truth, ye believe me not. 46 Which of you convinceth me of sin? And if I say the truth, why do ye not believe me? 47 He that is of God heareth God's words: ye therefore hear them not, because ye are not of God."
John 14:17 "Even the Spirit of truth; whom the world cannot receive, because it seeth him not, neither knoweth him: but ye know him; for he dwelleth with you, and shall be in you."
Acts 8:23 "For I perceive that thou art in the gall of bitterness, and in the bond of iniquity."
Rom 3:9-19 "What then? are we better than they? No, in no wise: for we have before proved both Jews and Gentiles, that they are all under sin; 10 As it is written, There is none righteous, no, not one: 11 There is none that understandeth, there is none that seeketh after God. 12 They are all gone out of the way, they are together become unprofitable; there is none that doeth good, no, not one. 13 Their throat is an open sepulchre; with their tongues they have used deceit; the poison of asps is under their lips: 14 Whose mouth is full of cursing and bitterness: 15 Their feet are swift to shed blood: 16 Destruction and misery are in their ways: 17 And the way of peace have they not known: 18 There is no fear of God before their eyes. 19 Now we know that what things soever the law saith, it saith to them who are under the law: that every mouth may be stopped, and all the world may become guilty before God."
1 Cor 2:14 "But the natural man receiveth not the things of the Spirit of God: for they are foolishness unto him: neither can he know them, because they are spiritually discerned."
2 Cor 4:3-4 "But if our gospel be hid, it is hid to them that are lost: 4 In whom the god of this world hath blinded the minds of them which believe not, lest the light of the glorious gospel of Christ, who is the image of God, should shine unto them."
Eph 2:1-3 "And you hath he quickened, who were dead in trespasses and sins: 2 Wherein in time past ye walked according to the course of this world, according to the prince of the power of the air, the spirit that now worketh in the children of disobedience: 3 Among whom also we all had our conversation in times past in the lusts of our flesh, fulfilling the desires of the flesh and of the mind; and were by nature the children of wrath, even as others."
Eph 4:17-19 "This I say therefore, and testify in the Lord, that ye henceforth walk not as other Gentiles walk, in the vanity of their mind, 18 Having the understanding darkened, being alienated from the life of God through the ignorance that is in them, because of the blindness of their heart: 19 Who being past feeling have given themselves over unto lasciviousness, to work all uncleanness with greediness."
Col 2:13 "And you, being dead in your sins and the uncircumcision of your flesh, hath he quickened together with him, having forgiven you all trespasses;"
2 Tim 2:24-26 "And the servant of the Lord must not strive; but be gentle unto all men, apt to teach, patient, 25 In meekness instructing those that oppose themselves; if God peradventure will give them repentance to the acknowledging of the truth; 26 And that they may recover themselves out of the snare of the devil, who are taken captive by him at his will."
I agree that God is not the author of confusion. However, that doesn't mean that we can figure out everything there is to figure out. Nobody understands the Trinity. Nobody understands HOW Jesus can be God and Man. There are lots of things that are impossible to make add up according to human logic, which is faulty at best. If the Bible teaches a doctrine, and it SEEMS to contradict a doctrine which is just as plainly taught, the problem is not with the doctrines or with the Bible, but with our feeble minds.