In order to disprove the assertion that all crows are black, one white crow is sufficient.

Strength is a facade for the proud, weakness is a mask for the lazy.

Plasticity, then, in the wide sense of the word, means the possession of a structure weak enough to yield to an influence, but strong enough not to yield all at once. Each relatively stable phase of equilibrium in such a structure is marked by what we may call a new set of habits.

We never fully grasp the import of any true statement until we have a clear notion of what the opposite untrue statement would be.

The instant field of the present is at all times what I call the 'pure' experience. It is only virtually or potentially either object or subject as yet.

We and God have business with each other, and in opening ourselves to God's influence our deepest destiny is fulfilled.

Science must constantly be reminded that her purposes are not the only purposes and that the order of uniform causation which she has use for, and is therefore right in postulating, may be enveloped in a wider order, on which she has no claim at all.