I am only one, but still I am one; I cannot do everything, but still I can do something; and because I cannot do everything I will not refuse to do the something that I can do.
Edward E. Hale
For everything you have missed, you have gained something else.
Ralph Waldo Emerson
Things don't change. You changer you way of looking, that's all.
If your house is on fire, warm yourself by it.
Obstacles cannot crush me; every obstacle yields to stern resolve.
Leonardo do Vinci