A short, finished list rather than an endless feed: 91 of the best strength quotes ever written, picked out of the full strength archive on QuoteForever. You will find Johann Wolfgang Von Goethe, Lao Tzu, Michael Jordan and Lee Ann Womack among them.
Read the list top to bottom, or use it as a starting point - every author name links to everything else they said, and every quote has its own page you can share or turn into an image.
Life is very interesting... in the end, some of your greatest pains, become your greatest strengths.
The perfection of Christian character depends wholly upon the grace and strength found alone in God.