Genius... means little more than the faculty of perceiving in an unhabitual way.

If the topic be highly abstract, show its nature by concrete examples. If it be unfamiliar, trace some point of analogy in it with the known. If it be inhuman, make it figure as part of a story. If it be difficult, couple its acquisition with some prospect of personal gain. Above all things, make sure that it shall run through certain inner changes, since no unvarying object can possibly hold the mental field for long.

The general law is that no mental modification ever occurs which is not accompanied or followed by a bodily change.

The old question of whether there is design is idle. The real question is what is the world, whether or not it have a designer--and that can be revealed only by the study of all nature's particulars.

The union of the mathematician with the poet, fervor with measure, passion with correctness, this surely is the ideal.

True ideas lead us into useful verbal and conceptual quarters as well as directly up to useful sensible termini. They lead to consistency, stability and flowing human intercourse.

We with our lives are like islands in the sea, or like trees in the forest... But the trees also commingle their roots in the darkness underground.