We may as well cut out group theory. That is a subject that will never be of any use in physics.

To travel hopefully is better than to arrive.

The motion of the stars over our heads is as much an illusion as that of the cows, trees and churches that flash past the windows of our train.

Science should leave off making pronouncements: the river of knowledge has too often turned back on itself.

Kant, discussing the various modes of perception by which the human mind apprehends nature, concluded that it is specially prone to see nature through mathematical spectacles. Just as a man wearing blue spectacles would see only a blue world, so Kant thought that, with our mental bias, we tend to see only a mathematical world.

All discussion of the ultimate nature of things must necessarily be barren unless we have some extraneous standards against which to compare them.

One must stand stiller than still. On reverse time travel.