A Quote by Denis Diderot

One must be oneself very little of a philosopher not to feel that the finest privilege of our reason consists in not believing in anything by the impulsion of a blind and mechanical instinct, and that it is to dishonour reason to put it in bonds as the Chaldeans did. Man is born to think for himself.
Nature has willed that man should, by himself, produce everything that goes beyond the mechanical ordering of his animal existence, and that he should partake of no other happiness or perfection than that which he himself, independently of instinct, has created by his own reason.
The choicest gift of God to man, the gift of reason; and having endeavoured to force upon himself the belief of a system against which reason revolts, he ungratefully calls it human reason; as if man could give reason to himself.
To write honestly and with conviction anything about the migration of birds, one should oneself have migrated. Somehow or other we should dehumanize ourselves, feel the feel of feathers on our body and wind in our wings, and finally know what it is to leave abundance and safety and daylight and yield to a compelling instinct, age-old, seeming at the time quite devoid of reason and object.
The opposition of instinct and reason is mainly illusory. Instinct, intuition, or insight is what first leads to the beliefs which subsequent reason confirms or confutes; but the confirmation, where it is possible, consists, in the last analysis, of agreement with other beliefs no less instinctive. Reason is a harmonizing, controlling force rather than a creative one. Even in the most purely logical realms, it is insight that first arrives at what is new.
The mechanical and social achievements of our day must not blind our eyes to the fact that, in all that relates to man, his nature and aspirations, we have added little or nothing to what has been so finely said by the great men of old.
Reason must be the universal rule and guide; all things must be done according to reason without allowing oneself to be swayed by emotion.
A man becomes a philosopher by reason of a certain perplexity, from which he seeks to free himself.
One love it is that pervades the whole world, few there are who know it fully: They are blind who hope to see it by the light of reason, that reason which is the cause of separation - The house of reason is very far away!
So far from having a materialistic tendency, the supposed introduction into the earth at successive geological periods of life,-sensation,-instinct,-the intelligence of the higher mammalia bordering on reason,-and lastly the improvable reason of Man himself, presents us with a picture of the ever-increasing dominion of mind over matter.
...I believe there exists, & I feel within me, an instinct for the truth, or knowledge or discovery, of something of the same nature as the instinct of virtue, & that our having such an instinct is reason enough for scientific researches without any practical results ever ensuing from them.
And when someone suggests you believe in a proposition, you must first examine it to see whether it is acceptable, because our reason was created by God, and whatever pleases our reason can but please divine reason, of which, for that matter, we know only what we infer from the processes of our own reason by analogy and often by negation.
Faith consists in believing what reason cannot.
There is a happiness in Deism, when rightly understood, that is not to be found inany other system of religion. All other systems have something in them that either shock our reason, or are repugnant to it, and man, if he thinks at all, must stifle his reason in order to force himself to believe them.
What is virtue? reason put into practice: -talent? reason expressed with brilliance: -soul? reason delicately put forth; and genius is sublime reason.
I feel like a small battlefield in which the problems, or some of the problems, of our time are being fought out. All one can hope to do is keep oneself humbly available, to allow oneself to be a battlefield. After all, the problems must be accommodated, have somewhere to struggle and come to rest and we, poor little humans, must put our inner space at their service and not run away.
Seeing that the Senses cannot decide our dispute, being themselves full of uncertainty, we must have recourse to Reason; there is no reason but must be built upon another reason: so here we are retreating backwards to infinity.
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