No limit, no definition, may restrict the range or depth of the human spirit's passage into its own secrets or the world's.

No two people see the world exactly alike, and different temperaments will often apply the same principle, recognized by both, differently. Even one and the same person won't always maintain the same views and judgments: earlier convictions must give way to later ones.

When the boy begins to understand that the visible point is preceded by an invisible point, that the shortest distance between two points is conceived as a straight line before it is ever drawn with pencil and paper...the fountain of all thought has been opened to him...the philosopher can reveal him nothing new, as a geometrician he has discovered the basis of all thought.

Stupidity is without anxiety.

One is led astray alike by sympathy and coldness, by praise and by blame

A good man, through obscurest aspirations Has still an instinct of the one true way.

He who serves the public is a poor animal; he worries himself to death and no one thanks him for it.