Enthusiasm is the mother of effort, and without it nothing great was ever achieved.

Unless you choose to do great things with it, it makes no difference how much you are rewarded, or how much power you have.

A great part of courage is the courage of having done the thing before.

To be conscious that you are ignorant of the facts is a great step to knowledge.

Some are born great, some achieve greatness, and some have greatness thrust upon them.

One sees great things from the valley only small things from the peak.

Great things are not accomplished by those who yield to trends and fads and popular opinion.

There is no pain so great as the memory of joy in present grief.

All difficult things have their origin in that which is easy, and great things in that which is small.

Only those who dare to fail greatly can ever achieve greatly.