What do we bring from our mother's womb, except sin?

Therefore we differ not one whit, one from another; but it pleaseth God to take those to Himself whom He would. And for this cause, St. Paul useth these words in another place, when he saith, men have not whereof to rejoice, for no man finds himself better than his fellows, unless it be because God discerneth him. So then, if we confess that God chose us before the world began, it necessarily follows, that God prepared us to receive His grace; that He bestowed upon us that goodness, which was not in us before; that He not only chose us to be heirs of the kingdom of heaven, but He likewise justifies us, and governs us by His Holy Spirit. The Christian ought to be so well resolved in this doctrine, that he is beyond doubt.

John Calvin