All Science is necessarily prophetic, so truly so, that the power of prophecy is the test, the infallible criterion, by which any presumed Science is ascertained to be actually & verily science. The Ptolemaic Astronomy was barely able to prognosticate a lunar eclipse; with Kepler and Newton came Science and Prophecy.

A single thought is that which it is from other thoughts as a wave of the sea takes its form and shape from the waves which precede and follow it.

Metaphysics,--the science which determines what can and what cannot be known of being and the laws of being.

The genius of the Spanish people is exquisitely subtle, without being at all acute; hence there is so much humour and so little wit in their literature.

Genius must have talent as its complement and implement, just as in like manner imagination must have fancy. In short, the higher intellectual powers can only act through a corresponding energy of the lower.

Friendship is a sheltering tree.

To see him act is like reading Shakespeare by flashes of lightning.