“In science the important thing is to modify and change one's ideas as science advances.”
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The more specific idea of Evolution now reached is - a change from an indefinite, incoherent homogeneity to a definite, coherent heterogeneity, accompanying the dissipation of motion and integration of matter.
The only way to make sense out of change is to plunge into it, move with it, and join the dance.
Heat of blood makes young people change their inclinations often, and habit makes old ones keep to theirs a great while.
The problem with being sure that God is on your side is that you can't change your mind, because God sure isn't going to change His.