If you listen to your fears, you will die never knowing what a great person you might have been.

What great thing would you attempt if you knew you could not fail?

I had rather attempt something great and fail, than to attempt nothing at all and succeed

Never underestimate your problem or your ability to deal with it.

Every person is responsible for all the good within the scope of his abilities, and for no more, and none can tell whose sphere is the largest.

I'd rather attempt to do something great and fail than to attempt to do nothing and succeed.