Not by constraint or severity shall you have access to true wisdom, but by abandonment, and childlike mirth-fulness. If you would know aught, be gay before it.

If I devote myself to other pursuits and contemplations, I must first see, at least, that I do not pursue them sitting upon another man's shoulders. I must get off him first, that he may pursue his contemplations too.

I could not undertake to form a nucleus of an institution for the development of infant minds, where none already existed. It would be too cruel.

The murmurs of many a famous river on the other side of the globe reach even to us here, as to more distant dwellers on its banks;many a poet's stream, floating the helms and shields of heroes on its bosom.

The only way to tell the truth is to speak with kindness. Only the words of a loving man can be heard.

The researcher is more memorable than the researched.

When any real progress is made, we unlearned and learn anew what we thought we knew before.