What line from a parent, teacher, or mentor do you still repeat to yourself?

One of my favorite lessons is best summed up in the words of an old Athabascan Indian who told me, “There are many hard things in life, but there is only one sad thing, and that is giving up.”

My father said to me, “You need a piece of paper to go into a door sometimes.” I didn’t understand about résumés, but when you write a résumé you have to put down things that people want to know about.

He gave me freedom at the age of 11, and told me that [I should] chase my dreams, but make sure you do not find short cuts. The path might be difficult, but don't give up, and I have simply followed his instructions. […] Every time I have done something special [and] showed my bat, it was [for] my father.