A word devoid of thought is a dead thing, and a thought unembodied in words remains a shadow.

Through others we become ourselves.

... People with great passions, people who accomplish great deeds, people who possess strong feelings, even people with great minds and a strong personality, rarely come out of good little boys and girls.

Learning is more than the acquisition of the ability to think; it is the acquisition of many specialized abilities for thinking about a variety of things.

What a child can do in cooperation today, he can do alone tomorrow.

Love can reach the same level of talent, and even genius, as the discovery of differential calculus.