Harlow Shapley quotes:

Theories crumble, but good observations never fade.

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.

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

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.

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

No one trusts a model except the man who wrote it; everyone trusts an observation, except the man who made it.