Men are not prisoners of fate, but prisoners of their own mind.
Whenever you are asked if you can do a job, tell them 'Certainly, I can!' Then get busy and find out how to do it.
The only limit to our realization of tomorrow will be our doubts of today.
It is common sense to choose a method and try it. If it fails, admit it frankly and try another. But above all, try something.
A radical is someone with their feet firmly planted in the air.