Quotations:

“I would wish you to think nothing good, or bad either, upon my decision. The first and the last thing I would say to man is, think for yourself.” — Epicurus, in "A Few Days In Athens"

This quote reminds me of these other quotations that I love:

“With eager judgement weigh things, and, if you see them true, lift your hands and yield, or, if it is false, gird yourself to battle.”

Lucretius

“We must come with our eyes and our ears, our hearts and our understandings open; anxious, not to find ourselves right, but to discover what is right; asserting nothing which we cannot prove; believing nothing which we have not examined.”

Epicurus, in "A Few Days In Athens"