Chaos is but unperceived order; it is a word indicating the limitations of the human mind and the paucity of observational facts. The words ‘chaos,’ ‘accidental,’ ‘chance,’ ‘unpredictable,’ are conveniences behind which we hide our ignorance.

It seems to me that the evidence ... is opposed to the view that the spirals are individual galaxies comparable with our own. In fact, there appears as yet no reason for modifying the tentative hypothesis that the spirals are not composed of typical stars at all, but are truly nebulous objects.

Chaos is but unperceived order; it is a word indicating the limitations of the human mind and the paucity of observational facts. The words ‘chaos,’ ‘accidental,’ ‘chance,’ ‘unpredictable,’ are conveniences behind which we hide our ignorance.

Some piously record 'In the beginning God', but I say 'In the beginning hydrogen'.

The solar system is off center and consequently man is too.

A hypothesis or theory is clear, decisive, and positive, but it is believed by no one but the man who created it. Experimental findings, on the other hand, are messy, inexact things, which are believed by everyone except the man who did that work.

Theories crumble, but good observations never fade.