Baruch Spinoza

We must take care not to admit as true anything, which is only probable. For when one falsity has been let in, infinite others follow.

Spinoza

Nothing in the universe is contingent, but all things are conditioned to exist and operate in a particular manner by the necessity of the Divine nature.

Baruch Spinoza

Be not astonished at new ideas, for it is well known to you that a thing does not therefore cease to be true because it is not accepted by many.