I have a few I like:
Go confidently in the direction of your dreams. Live the life you have imagined –Henry David Thoreau
The snow always melts away to give way to spring - Tohru Honda
There is only one limit to what prayer can do; that is what God can do –R. A. Torrey
These are some of mine:
Strength of mind is what brings out our capacity to achieve our desired goal, not some innate gift or talent. This is the true meaning of passion!
Do not lose confidence in what you honestly love...