Every production of genius must be the production of enthusiasm.

Every production of genius must be the production of enthusiasm.

Enthusiasm is the leaping lightning, not to be measured by the horse- power of the understanding.

Enthusiasm is the leaping lightning, not to be measured by the horse- power of the understanding.

Courage is going from failure to failure without losing enthusiasm.

Courage is going from failure to failure without losing enthusiasm.

Enthusiasm is contagious. Be a carrier.

Enthusiasm is contagious. Be a carrier.

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

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

In things pertaining to enthusiasm, no man is sane who does not know how to be insane on proper occasions.

In things pertaining to enthusiasm, no man is sane who does not know how to be insane on proper occasions.

None are so old as those who have outlived enthusiasm

None are so old as those who have outlived enthusiasm

For every sale you miss because you're too enthusiastic, you will miss a hundred because you're not enthusiastic enough.

For every sale you miss because you're too enthusiastic, you will miss a hundred because you're not enthusiastic enough.

Catch on fire with enthusiasm and people will come for miles to watch you burn.

Catch on fire with enthusiasm and people will come for miles to watch you burn.