Many of the snarly bad-tempered teachers whom we remember with hatred were really nice people soured by years of anxiety and penny-pinching.

He meant that when people laugh together, they cease to be young and old, master and pupils, jailer and prisoners. They become a single group of human beings enjoying its existence.

I believe that much of the maladjustment in our societies is caused, not by malevolence and corruption, but simply by ignorance.

The wise teacher knows that 55 minutes of work plus 5 minutes laughter are worth twice as much as 60 minutes of unvaried work.

The mind never need stop growing. Indeed, one of the few experiences which never pall is the experience of watching one's own mind and how it produces new interests, responds to new stimuli, and develops new thoughts, apparently without effort and almost independently of one's own conscious control.

Know the subject; love the subject; like your students; know your students.

Like all great teachers he knew that a picture is worth a thousand words and that people learn most quickly by doing something or seeing something done.