They must often change, who would be constant in happiness or wisdom.

Our greatest glory is not in never falling, but in rising every time we fall.

The strength of a nation derives from the integrity of the home.

Real knowledge is to know the extent of one's ignorance.

Real knowledge is to know the extent of one's ignorance.

When you know a thing, to hold that you know it, and when you do not know a thing, to allow that you do not know it - this is knowledge.

The cautious seldom err.

He who learns but does not think, is lost! He who thinks but does not learn is in great danger.

You cannot open a book without learning something.

Learning without thought is labor lost thought without learning is perilous.