The only limit to our realization of tomorrow will be our doubts of today.
Doubt yourself and you doubt everything you see. Judge yourself and you see judges everywhere. But if you listen to the sound of your own voice, you can rise above doubt and judgment. And you can see forever.
Finish each day and be done with it. You have done what you could. Some blunders and absurdities no doubt crept in; forget them as soon as you can. Tomorrow is a new day; begin it well and serenely and with too high a spirit to be encumbered with your old nonsense.
The whole problem with the world is that fools and fanatics are always so certain of themselves, and wiser people so full of doubts.
The lens of fear magnifies the size of uncertainty.
Willpower is the key to success. Successful people strive no matter what they feel by applying their will to overcome apathy, doubt or fear.
Love and doubt have never been on speaking terms.
If you would be a real seeker after truth, it is necessary that at least once in your life you doubt, as far as possible, all things.
Truth is beautiful, without doubt; but so are lies.
Inaction breeds doubt and fear. Action breeds confidence and courage.
Cleave ever to the sunnier side of doubt.
Our doubts are traitors and make us lose the good we oft might win by fearing to attempt.
Laugh at yourself, but don't ever aim your doubt at yourself. Be bold. When you embark for strange places, don't leave any of yourself safely on shore. Have the nerve to go into unexplored territory.
Doubt is not a pleasant condition, but certainty is absurd.
There is nothing more dreadful than the habit of doubt. Doubt separates people. It is a poison that disintegrates friendships and breaks up pleasant.
Doubt is the shadow of truth.
When in doubt tell the truth.
To have doubted one's own first principles is the mark of a civilized man.
Wonder rather than doubt is the root of all knowledge.
Doubt, of whatever kind, can be ended by action alone.
The fearful unbelief is unbelief in yourself.
To give a reason for anything is to breed a doubt of it.
Jealousy lives upon doubts. It becomes madness or ceases entirely as soon as we pass from doubt to certainty.
There is no rule more invariable than that we are paid for our suspicions by finding what we suspect.
Doubt is the origin of wisdom
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