It is the nature of every person to error, but only the fool perseveres in error.

An old man with something of the youth in him, may feel young in mind and heart only.

No deceit is so veiled as that which lies concealed behind the semblance of courtesy.

Enmity is anger watching the opportunity for revenge.

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

Death approaches, which is always impending like the stone over Tantalus: then comes superstition with which he who is imbued can never have peace of mind.

Memory is the receptacle and sheath of all knowledge