It's time to move on to the next step in the psychedelic revolution. We've reached a certain point, but we're not moving any more.
Ken Kesey

A doubtful friend is worse than a certain enemy. Let a man be one thing or the other, and we then know how to meet him.
Aesop

Devout believers are safeguarded in a high degree against the risk of certain neurotic illnesses; their acceptance of the universal neurosis spares them the task of constructing a personal one.
Anatole France

The fundamental point in fabricating a chain reacting machine is of course to see to it that each fission produces a certain number of neutrons and some of these neutrons will again produce fission.
Enrico Fermi

I've studied various schools of thought... I acknowledge that some Muslims consider music prohibited, but I've found a lot of evidence from the life of the Prophet to show that he allowed certainly, but even encouraged, music at certain times.
Cat Stevens

Life is to be lived, not controlled, and humanity is won by continuing to play in face of certain defeat.
Ralph Ellison

There is hardly a man on earth who will take advice unless he is certain that it is positively bad.
John Burroughs

There is surely no contradiction in saying that a certain section of the community may be quite competent to protect the persons and property of the rest, yet quite unfit to direct our opinions, or to superintend our private habits.
Thomas Babington

God put me on this earth to accomplish a certain number of things. Right now I am so far behind that I will never die.
Bill Watterson

There are certain queer times and occasions in this strange mixed affair we call life when a man takes his whole universe for a vast practical joke.
Herman Melville

For all that has been said of the love that certain natures (on shore) have professed for it, for all the celebrations it has been the object of in prose and song, the sea has never been friendly to man. At most it has been the accomplice of human restlessness.
Joseph Conrad

Good advice is always certain to be ignored, but that's no reason not to give it.
Agatha Christie

If you're treated a certain way you become a certain kind of person. If certain things are described to you as being real they're real for you whether they're real or not.
James Baldwin

I always wanted my music to influence the life you were living emotionally - with your family, your lover, your wife, and, at a certain point, with your children.
Bruce Springsteen

You have to allow a certain amount of time in which you are doing nothing in order to have things occur to you, to let your mind think.
Mortimer Adler

What art offers is space - a certain breathing room for the spirit.
John Updike

Truth should not be forced; it should simply manifest itself, like a woman who has in her privacy reflected and coolly decided to bestow herself upon a certain man.
John Updike

If some great catastrophe is not announced every morning, we feel a certain void. Nothing in the paper today, we sigh.
Lord Acton

I have arrived at the conviction that the neglect by economists to discuss seriously what is really the crucial problem of our time is due to a certain timidity about soiling their hands by going from purely scientific questions into value questions.
Friedrich August von Hayek

I believe that if we really want human brotherhood to spread and increase until it makes life safe and sane, we must also be certain that there is no one true faith or path by which it may spread.
Adlai E. Stevenson