--Thomas Huxley, scientist
"Do not let what you cannot do interfere with what you can do."
--John Wooden, Basketball coach
"No chance, no destiny, no fate, can circumvent or hinder or control the firm resolve of a determined soul."
--Ella Wheeler Wilcox, author and poet
"Real difficulties can be overcome; it is only the imaginary ones that are unconquerable."
--Theodore Vail, industrialist
"Optimism is the faith that leads to achievement. Nothing can be done without hope and confidence."
--Helen Keller, author and political activist