The only difference between the saved man and the unsaved man is the Grace of God.
The only difference between the godly and the ungodly is the Grace of God.
The only difference between the one diligently pressing towards Heaven, and the one sprinting and "usain-bolting" towards Hell is the Grace of God.
There is nothing else to lay claim to. Nothing else to hold on to.
Not rules of piety nor works of propriety.
But that the Grace of God appeared to all men and some embraced it, while others disdained it.
Oh that you will understand that the difference between the preacher and the stripper is the Grace of God.
When the believer understands this, he won't brag or condemn anyone, but will have a heart of gratitude towards God, and liquefied supernatural overflowing compassion towards men.
When the sinner suddenly understands this amazing Grace of God, He begins to wonder why it took him so long to embrace it.
So Paul concludes, "By the grace of God I am what I am" (1Cor. 15:10)