“Control what you can control. I can control my emotions, my concentration, my effort, my intensity.”— Andre Agassi
“Have regular hours for work and play; make each day both useful and pleasant, and prove that you understand the worth of time by employing it well.”— Louisa May Alcott
“If you can keep playing tennis when somebody is shooting a gun down the street, that's concentration.”— Chris Evert
“Being a professional is doing the things you love to do, on the days you don't feel like doing them.”— Jensen Ackles
“A good functional programming style is not a panacea, it does not magically solve all problems, but it is a good discipline.”— John Backus
“I've always been a firm believer in the blue-collar mentality. Go to work, do your job, and don't complain.”— Benjamin Bratt
“People who have no hold over their process of thinking are likely to be ruined by liberty of thought.”— Muhammad Iqbal