I suppose, however, that praying everyday for many years for God to teach me the truth and protect me from error had something to do with what I learned.
So God failed those who disagree with you??? I firmly believe that you have been mislead on this. I believe I can show you that from Scripture. But to claim that you believe what you do because God "taught you the truth and protected you from error" is to beg the question. We believe the same thing about our doctrine.
Here are just a few of the many verses that show OSAS to be the doctrine of Scripture. Your insistence that this doctrine is not clearly taught flies in teh face of the text itself. Each of these passages (and many others) could be defended at length against those who would say they don't mean that we are eternally saved.
John 10:27-29 "My sheep hear My voice, and I know them, and they follow Me; 28 and I give eternal life to them, and they will never perish; and no one will snatch them out of My hand. 29 "My Father, who has given them to Me, is greater than all; and no one is able to snatch them out of the Father's hand.
• Eternal life/never perish
• No one can snatch them out of my hand or the Father’s hand.
1 Peter 1:3-5 Blessed be the God and Father of our Lord Jesus Christ, who according to His great mercy has caused us to be born again to a living hope through the resurrection of Jesus Christ from the dead, 4 to obtain an inheritance which is imperishable and undefiled and will not fade away, reserved in heaven for you, 5 who are protected by the power of God through faith for a salvation ready to be revealed in the last time.
• Believers are kept by God
• Believers are kept through faith, not irrespective of faith.
• Believers are kept for final salvation (in the last time).
John 6:37-40 "All that the Father gives Me will come to Me, and the one who comes to Me I will certainly not cast out. 38 "For I have come down from heaven, not to do My own will, but the will of Him who sent Me. 39 "This is the will of Him who sent Me, that of all that He has given Me I lose nothing, but raise it up on the last day. 40 "For this is the will of My Father, that everyone who beholds the Son and believes in Him will have eternal life, and I Myself will raise him up on the last day."
• All who come will be accepted.
• God’s will is that those whom he has given to Christ will be raised up.
• Christ came to do his father’s will and therefore will to raise them up at the last day.
Romans 8:31-39 What then shall we say to these things? If God is for us, who is against us? 32 He who did not spare His own Son, but delivered Him over for us all, how will He not also with Him freely give us all things? 33 Who will bring a charge against God's elect? God is the one who justifies; 34 who is the one who condemns? Christ Jesus is He who died, yes, rather who was raised, who is at the right hand of God, who also intercedes for us. 35 Who will separate us from the love of Christ? Will tribulation, or distress, or persecution, or famine, or nakedness, or peril, or sword? 36 Just as it is written, "FOR YOUR SAKE WE ARE BEING PUT TO DEATH ALL DAY LONG; WE WERE CONSIDERED AS SHEEP TO BE SLAUGHTERED." 37 But in all these things we overwhelmingly conquer through Him who loved us. 38 For I am convinced that neither death, nor life, nor angels, nor principalities, nor things present, nor things to come, nor powers, 39 nor height, nor depth, nor any other created thing, will be able to separate us from the love of God, which is in Christ Jesus our Lord.
• God is for us. Who can be against us?
• Who can charge God’s elect since Christ is interceding for us?
• Nothing can separate us from the love of God.
Ephesians 4:30 Do not grieve the Holy Spirit of God, by whom you were sealed for the day of redemption.
• The Holy Spirit’s seal is good until the day of redemption (cf 1:13-14).
Philippians 1:6 For I am confident of this very thing, that He who began a good work in you will perfect it until the day of Christ Jesus.
• God began it and therefore he will finish it.
1 Thessalonians 5:23-24 Now may the God of peace Himself sanctify you entirely; and may your spirit and soul and body be preserved complete, without blame at the coming of our Lord Jesus Christ. 24 Faithful is He who calls you, and He also will bring it to pass.
• God’s desire is that believers be preserved completely and without blame at Christ’s coming.
• He called us to salvation; he will bring it to pass.
2 Thessalonians 3:3 But the Lord is faithful, and He will strengthen and protect you from the evil one.
• God is at work protecting us from Satan.
In the end, the very faithfulness and promises of God are at stake. If we are not eternally saved, then Christ's death is less than perfect, God's faithfulness simply isn't faithfulness, and we are saved by our own efforts. That is not biblical, in any sense of the word.