To live a pure unselfish life, one must count nothing as ones own in the midst of abundance.

We must test our theories with the rigor of experiments.

The measure of intelligence is the ability to change.

Pure mathematics is, in its way, the poetry of logical ideas.

Sweet Thames, run softly till I end my song.

If you don't design your future, someone or something else will design it for you.

The advantage of the emotions is that they lead us astray.