'All adverse and depressing influences can be overcome, not by fighting, but by rising above them."
- Charles Caleb Colton

"We must accept finite disappointment, but we must never lose infinite hope."
- Martin Luther King

"It may be that those who do most, dream most."
- Stephen Butler Leacock

"To love long and achieve happiness, cultivate the art of radiating happiness."
- Malcom Forbes

"Kindness is a language which the deaf can hear and the blind can read."
- Mark Twain

"Optimism is the faith that leads to achievement. Nothing can be done without hope and confidence."
- Helen Keller

"I shall allow no man to belittle my soul by making me hate him."
"We should never allow our grievances to overshadow our opportunities."
"It's better to be alone than in bad company."
"Success is not to be measured by the position that one has reached in life but by the obstacles which he has overcome."
- Booker T. Washington

and a personal favorite...

"Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind."
- Dr. Seuss