That is a fundamental difference in how "grace" (man does NOTHING or it is no longer "grace") is perceived.
States the difference between calvinistic and semi-pelagian thinking quite well.
God regenerates/saves man by grace alone without works
or
God regenerates/saves man only if man cooperates with God.
Yes, and scripture shows man must cooperate with God's grace.
Heb 6:4 For it is impossible for those who were once enlightened, and have tasted of the heavenly gift, and were made partakers of the Holy Ghost,
5 And have tasted the good word of God, and the powers of the world to come,
6 If they shall fall away, to renew them again unto repentance; seeing they crucify to themselves the Son of God afresh, and put him to an open shame.
7 For the earth which drinketh in the rain that cometh oft upon it, and bringeth forth herbs meet for them by whom it is dressed, receiveth blessing from God:
8 But that which beareth thorns and briers is rejected, and is nigh unto cursing; whose end is to be burned.
9 But, beloved, we are persuaded better things of you, and things that accompany salvation, though we thus speak.
This passage is speaking of persons who have received God's grace. They have been enlightened, tasted of the heavenly gift, made partakers of the Holy Ghost, tasted the word of God and the powers of the world to come. They have been brought to the point of repentance, but have fallen away in unbelief.
And then the writer compares these persons to the earth, as Jesus compared those who heard the word of God to ground in the parable of sower.
It shows earth that has been rained upon by God, it has been dressed, and that it is expected to bring forth good fruit.
But that earth that brings forth thorns and briers is rejected, nigh to be cursed or damned, and it's end is to be burned.
This is also similar to the parable of the talents, where one man is given five talents and earns five more, another is given two talents and earns two more, and the last is given one talent. This person does not use his talent to earn more but buries it in the earth. When the lord of those servants returned he praised those servants who used the talents (grace) given them and earned more. He was angry at the servant who hid his talent in the earth and did not utilize it. He gave his talent to the first servant, and cast the unprofitable servant into outer darkness.
Mat 25:29 For unto every one that hath shall be given, and he shall have abundance: but from him that hath not shall be taken away even that which he hath.
30 And cast ye the unprofitable servant into outer darkness: there shall be weeping and gnashing of teeth.
31 When the Son of man shall come in his glory, and all the holy angels with him, then shall he sit upon the throne of his glory:
32 And before him shall be gathered all nations: and he shall separate them one from another, as a shepherd divideth his sheep from the goats:
33 And he shall set the sheep on his right hand, but the goats on the left.
And we see this parable regards salvation, for Jesus directly proceeds to tell us of sheep and goats. The sheep are those who utilize the grace given them, the goats are those who foolishly waste the grace given them.
We do not earn God's grace, but we are expected to receive it and make use of it. If not, that which was given shall be taken away.