A Quote by John F. Kennedy

There is nothing more certain and unchanging than uncertainty and change. — © John F. Kennedy
There is nothing more certain and unchanging than uncertainty and change.
It would be a mistake to assume that the present day educational system is unchanging. On the contrary, it is undergoing rapid change. But much of this change is no more than an attempt to refine the existent machinery, making it ever more efficient in pursuit of obsolete goals.
I try to follow certain rules. Nothing in Élysée Palace should become habitual, because routine lends one a deceptive feeling of security. You begin not noticing certain things and lose your focus on what's important. Uncertainty and change keep you attentive. This place and, to a certain extent, my office, help me avoid developing habits.
Among these things, one thing seems certain - that nothing certain exists and that there is nothing more pitiful or more presumptuous than man.
It is only certain that there is nothing certain, and that nothing is more miserable or more proud than man.
Nothing is certain by uncertainty.
While nothing is more uncertain than a single life, nothing is more certain than the average duration of a thousand lives.
The uncertainty of our future is nothing more than a fog of breath on a windowpane.
There is nothing permanent except change. Nothing is permanent except change. The only constant is change. Change is the only constant. Change alone is unchanging.
Life on earth, filled with uncertainty and change, seemed far more difficult than what lay beyond the grave.
Nothing, they say is more certain than death, and nothing more uncertain than the time of dying
Real danger is nothing more than just living. Of course, living is merely the chaos of existence, but more than that it's a crazy mixed-up business of dismantling existence instant by instant to the point where the original chaos is restored, and taking strength from the uncertainty and the fear that chaos brings to re-create existence instant by instant. You won't find another job as dangerous as that. There isn't any fear in existence itself, or any uncertainty, but living creates it.
What I can control and all I know as of today, I am signed up for one more year...I guess things could change, but with all the uncertainty in many aspects, I don't see (his decision not to sign an extension) changing before camp gets here, and when camp gets here I'm even more certain to play it out.
Nothing has given me more hope recently than to observe how simple conversations give birth to actions that can change lives and restore our faith in the future. There is no more powerful way to initiate significant social change than to start a conversation. When a group of people discover that they share a common concern, that's when the process of change begins.
It takes courage to acknowledge uncertainty. And nothing is more attractive than demonstrating to another person that he or she is of value to you.
In terms of technology and science, tomorrow does know more than yesterday; but when it comes to emotions, living with uncertainty, terror, I'm not sure we know any more than Shakespeare did, or the Buddha. And the power of new things - the iPhone or Facebook - is so strong and intoxicating that we sometimes forget that none of them can fundamentally change our relation to ourselves and to what matters.
You call yourself some kind of goddess and you know nothing, madam, nothing. What don't die can't live. What don't live can't change. What don't change can't learn. The smallest creature that dies in the grass knows more than you.
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