Thomas Jefferson Quotes

Reason and free inquiry are the only effectual agents against error.

We need a world where the values of science are celebrated: free inquiry, free speech and a healthy skepticism, all coupled with a sense of wonder, a respect for truth and an ability to reason.

Reason and free inquiry are the only effective agents against error. Give a loose to them, they will support the true religion by bringing every false one to their tribunal, to the test of their investigation. They are the natural enemies of error and error only. Had not the Roman government permitted free inquiry, Christianity could never have been introduced. Had not free inquiry been indulged at the era of the Reformation, the corruption of Christianity could not have been purged away.

The principle itself of dogmatic religion, dogmatic morality, dogmatic philosophy, is what requires to be rooted out; not any particular manifestation of that principle. The very corner-stone of an education intended to form great minds, must be the recognition of the principle, that the object is to call forth the greatest possible quantity of intellectual power, and to inspire the intensest love of truth.

I hold it certain that to open the doors of truth and to fortify the habit of testing everything by reason are the most effectual manacles we can rivet on the hands of our successors to prevent their manacling the people with their own consent.

Our weapons are the ironic mind against the literal: the open mind against the credulous; the courageous pursuit of truth against the fearful and abject forces who would set limits to investigation (and who stupidly claim that we already have all the truth we need). Perhaps above all, we affirm life over the cults of death and human sacrifice and are afraid, not of inevitable death, but rather of a human life that is cramped and distorted by the pathetic need to offer mindless adulation, or the dismal belief that the laws of nature respond to wailings and incantations.

Do not believe in anything simply because you have heard it. Do not believe in anything simply because it is spoken and rumored by many. Do not believe in anything simply because it is found written in your religious books. Do not believe in anything merely on the authority of your teachers and elders. Do not believe in traditions because they have been handed down for many generations. But after observation and analysis, when you find that anything agrees with reason and is conducive to the good and benefit of one and all, then accept it and live up to it

All I claim, all I plead for, is liberty of thought and expression. That is all. I do not pretend to tell what is absolutely true, but what I think is true. I do not pretend to tell all the truth..

Embrace truth as it is revealed to-day by human reason.

Our belief is not a belief. Our principles are not a faith. We do not rely soley upon science and reason, because these are necessary rather than sufficient factors, but we distrust anything that contradicts science or outrages reason. We may differ on many things, but what we respect is free inquiry, openmindedness, and the pursuit of ideas for their own sake.

Freethought is respectable. Freethought is crucial. Freethought needs to be publicized.

Truth for authority, not authority for truth.

If you shut the door to all errors, truth will be shut out.

I was bold in the pursuit of knowledge, never fearing to follow truth and reason to whatever results they led, and bearding every authority which stood in their way.

Fix reason firmly in her seat, and call to her tribunal every fact, every opinion. Question with boldness even the existence of a God; because, if there be one, he must more approve of the homage of reason, than that of blindfolded fear.

Let the winds of evidence blow you about as though you are a leaf, with no direction of your own. Beware lest you fight a rearguard retreat against the evidence, grudgingly conceding each foot of ground only when forced, feeling cheated. Surrender to the truth as quickly as you can.

One of the most important things one can do in life is to brutally question every single thing you are taught.

The truth is found when men are free to pursue it.

What is wanted is not the will to believe, but the will to find out, which is the exact opposite.

An unexamined faith is not worth having, for fundamentalism and uncritical certitude entail the rejection of one of the great human gifts: that of free will, of the liberty to make up our own minds based on evidence and tradition and reason.

If we would guide by the light of reason we must let our minds be bold.

Only reason can convince us of those three fundamental truths without a recognition of which there can be no effective liberty: that what we believe is not necessarily good; and that all questions are open.

We have a right to know or may lawfully know any truth. And a right to know any truth whatsoever implies a right to think freely.

Error of opinion may be tolerated where reason is left free to combat it.

[It is] ... a sound maxim that it is better only sometimes to be right than at all times to be wrong, so soon as I discover my opinions to be erroneous, I shall be ready to renounce them.