No Tomorrow

God is not now so long-suffering in putting up with you that He will fail to be just in punishing. Do not say then: 'Tomorrow I shall be converted, tomorrow I shall please God, and all that I shall have done today and yesterday will be forgiven me.' What you say is true: God has promised forgiveness if you turn back to Him. But what He has not promised is that you will have tomorrow in which to achieve your conversion.

-- Augustine of Hippo (354-430 A.D.), excerpt from Commentary on Psalm 144,11