Take up one idea. Make that one idea your life - think of it, dream of it, live on that idea. Let the brain, muscles, nerves, every part of your body, be full of that idea, and just leave every other idea alone. This is the way to success.
To live in the presence of great truths and eternal laws, to be led by permanent ideals - that is what keeps a man patient when the world ignores him, and calm and unspoiled when the world praises him.
Courage is not having the strength to go on, it is going on when you don't have the strength. Industry and determination can do anything that genius and advantage can do and many things that they cannot.