New opinions often appear first as jokes and fancies, then as blasphemies and treason, then as questions open to discussion, and finally as established truths.
Truth is more deceptive than falsehood, for it is more frequently presented by those from whom we do not expect it, and so has against it a numerical presumption.
Even great spirits have only their five-fingers' breadth of experience - just beyond it their thinking ceases and their endless empty space and stupidity begins.