There are many who dare not kill themselves for fear of what the neighbors will say.

No liberal man would impute a charge of unsteadiness to another for having changed his opinion.

Popular opinion is the greatest lie in the world.

The man who never alters his opinions is like standing water, and breeds reptiles of the mind.

How much time he saves who does not look to see what his neighbor says or does or thinks.

What nature delivers to us is never stale. Because what nature creates has eternity in it.

Nature is not affected by finance. If someone offered you ten thousand dollars to let them touch your eyeball without blinking, you would never collect the money. At the very last moment, Nature would force you to blink your eye. Nature will protect her own.

Education is what survives when what has been learned has been forgotten.

Nature hates calculators.

Nature is a mutable cloud, which is always and never the same.