O God, our Father, we are exceedingly frail, and indisposed to every virtuous and gallant undertaking: Strengthen our weakness, we beseech thee, that we may do valiantly in this spiritual war; help us against our own negligence and cowardice, and defend us from the treachery of our unfaithful hearts; for the sake of Jesus Christ our Lord.
–Saint Augustine (353-430)
FYI today is Great and Holy Friday on the Orthodox calendar.