Grace stands in direct opposition to any supposed worthiness on our part. To say it another way: Grace and works are mutually exclusive. As Paul said in Romans 11:6, "And if by grace, then it is no longer by works; if it were, grace would no longer be grace." Our relationship with God is based on either works or grace. There is never a works-plus-grace relationship with Him.
Jerry BridgesIn the deceitfulness of our hearts, we sometimes play with temptation by entertaining the thought that we can always confess and later ask forgiveness. Such thinking is exceedingly dangerous. God’s judgement is without partiality. He never overlooks our sin. He never decides not to bother, since the sin is only a small one. No, God hates sin intensely whenever and wherever He finds it.
Jerry BridgesOur first problem is that our attitude towards sin is more self-centred than God-centred. We are more concerned about our own "Victory" over sin than we are about the fact that our sin grieve the heart of God. We cannot tolerate failure in our struggle with sin chiefly because we are success oriented, not because we know it is offensive to God.
Jerry BridgesThe pursuit of holiness must be anchored in the grace of God; otherwise it is doomed to failure
Jerry Bridges