Nature has granted the use of life like a loan, without fixing any day for repayment.

We forget our pleasures, we remember our sufferings.

No man can be brave who thinks pain the greatest evil; nor temperate, who considers pleasure the highest good.

"I believe that no characteristic is so distinctively human as the sense of indebtedness we feel, not necessarily for a favor received, but even for the slightest evidence of kindness; and there is nothing so boorish, savage, inhuman as to appear to be overwhelmed by a favor, let alone unworthy of it."

What is thine is mine, and all mine is thine.

The study and knowledge of the universe would somehow be lame and defective were no practical results to follow.

Nature has circumscribed the field of life within small dimensions, but has left the field of glory unmeasured.