You send your child to the schoolmaster, but 'tis the schoolboys who educate him.

I pay the schoolmaster but 'tis the schoolboys who educate my son

The years teach much which the days never know

The cardinal virtue of a teacher (is) to protect the pupil from his own influence

The whole secret of the teacher's force lies in the conviction that man are convertible.

The wise skeptic does not teach doubt but how to look for the permanent in the mutable and fleeting.