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.

A mediocre idea that generates enthusiasm will go further than a great idea that inspires no one.

A mediocre idea that generates enthusiasm will go further than a great idea that inspires no one.

None are so old as those who have outlived enthusiasm.

None are so old as those who have outlived enthusiasm.

There is a real magic in enthusiasm. It spells the difference between mediocrity and accomplishment.

There is a real magic in enthusiasm. It spells the difference between mediocrity and accomplishment.

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.

Enthusiasm is everything. It must be taut and vibrating like a guitar string.

Enthusiasm is everything. It must be taut and vibrating like a guitar string.

I prefer the folly of enthusiasm to the indifference of wisdom.

I prefer the folly of enthusiasm to the indifference of wisdom.

Enthusiasm is excitement with inspiration, motivation, and a pinch of creativity.

Enthusiasm is excitement with inspiration, motivation, and a pinch of creativity.

Zeal without knowledge is fire without light.

Zeal without knowledge is fire without light.