The contributions the redeemed can be said to contribute to the price paid or to the transaction have to be imaginary. Humans are not part of the price. Christ paid all by himself.
Redeemed by Christ’s gift of himself.
Titus 2:11-15
For the grace of God that bringeth salvation hath appeared to all men, Teaching us that, denying ungodliness and worldly lusts, we should live soberly, righteously, and godly, in this present world; Looking for that blessed hope, and the glorious appearing of the great God and our Saviour Jesus Christ; Who gave himself for us,
Purified by the one who gave himself
that he might redeem us from all iniquity, and purify unto himself a peculiar people, zealous of good works. These things speak, and exhort, and rebuke with all authority. Let no man despise thee.
The purity of life the believer experiences is not the result of his performance. Our purity, after being redeemed from all iniquity, is the devotion to and enjoyment of the unadulterated values found only in Christ’s person.
The good or beautiful works we find ourselves engaging in are not the result of our choice, as if God has not already approved the thoughts, wishes and feelings he wants to be glorified in.