As you can not do what you wish, you should wish what you can do.
Quoniam id fieri quod vis non potest
Id velis quod possis.
Id velis quod possis.
Original text (Latin)
More quotes by Terence
There is nothing so easy but that it becomes difficult when you do it reluctantly.
It behooves a prudent person to make trial of everything before arms.
Do you fear to trust the word of a man, whose honesty you have seen in business?
Attribution
Quote text and notes from Wikiquote: Terence (page history), available under CC BY-SA 4.0. Source quality and labels are our own summary of what Wikiquote records.