You'll see that many of these observations apply to trading and business. Here are a few of my favorites:
"A loser doesn’t know what he’ll do if he loses, but talks about what he’ll do if he wins, and a winner doesn’t talk about what he’ll do if he wins, but knows what he’ll do if he loses."
"There may be as much nobility in being last as in being first, because the two positions are equally necessary in the world, the one to complement the other." - Jose Ortega y Gasset
"Wise men never sit and wail their loss, but cheerily seek how to redress their harms." - Shakespeare
"When wealth is lost, nothing is lost; when health is lost, something is lost; when character is lost, all is lost." - Motto