Certainty Quotes & Sayings
These famous certainty quotes and certainty sayings from our inspirational words of wisdom collection.When I consider this carefully, I find not a single property which with certainty separates the waking state from the dream. How can you be certain that your whole life is not a dream? - Rene Descartes
To believe with certainty we must begin with doubting. - Stanislaus I
If I knew for a certainty that a man was coming to my house with the conscious design of doing me good, I should run for my life. - Henry David Thoreau
The responses of human beings vary greatly under dangerous circumstances. The strong man advances boldly to meet them head on. The weak man grows agitated. But the superior man stands up to fate, endures resolutely in his inner certainty If ignorant both. - I Ching
A thousand reasoned opinions are never equal to one case of diving in and finding out. Galileo proved that and it may be the only certainty we have. [Time Enough for Love] - Robert A. Heinlein
The only unchangeable certainty is that nothing is unchangeable or certain. - John Fitzgerald Kennedy
One must learn by doing the thing; though you think you know it, you have no certainty until you try. - Sophocles
The one unchangeable certainty is that nothing is unchangeable or certain. - John Fitzgerald Kennedy
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