Good questions outrank easy answers. -Paul A. Samuelson

Whoever is afraid of submitting any question, civil or religious, to
the test of free discussion, is more in love with his own opinion than
with truth. -T. Watson

I would rather have a mind opened by wonder than one closed by belief.
-Gerry Spence

Common sense isn't very common at all.

Intelligence is like a river. The deeper it is, the less noise it

Common sense is that layer of prejudices which we acquire before we
are sixteen. -Albert Einstein

The obvious is that which is never seen until someone expresses it
simply. -Kahlil Gibran

Begin challenging your own assumptions. Your assumptions are your
windows on the world. Scrub them off every once in while, or the light
won't come in. -Alan Alda

We can't solve problems by using the same kind of thinking we used
when we created them. -Albert Einstein

Don't believe everything you think.

Give the people a new word and they think they have a new fact.
-Willa Cather

Reason can answer questions, but imagination has to ask them.
-Ralph Gerard

The intuitive mind is a sacred gift and the rational mind is a
faithful servant. We have created a society that honors the servant
and has forgotten the gift. -Albert Einstein

Often the hands will solve a mystery that the intellect has struggled
with in vain. -Carl G. Jung

I believe that imagination is stronger than knowledge -- that myth is
more potent than history. I believe that dreams are more powerful than
facts -- That hope always triumphs over experience -- That laughter is
the only cure for grief. And I believe that love is stronger than
death. -Robert Fulghum

You cannot reason a person out of a position he did not reason himself
into in the first place. -Jonathan Swift

Reasoning with a child is fine, if you can reach the child's reason
without destroying your own. -John Mason Brown

All are lunatics, but he who can analyze his delusion, is a
philosopher. -H. L. Mencken

I would rather live in a world where my life is surrounded by mystery
than live in a world so small that my mind could comprehend it.
-Harry Emerson Fosdick

I should like to see these profound words inscribed on the threshold
of all the temples of science: 'The greatest derangement of the mind
is to believe in something because one wishes it to be so.
-Louis Pasteur

Freedom of speech and freedom of action are meaningless without
freedom to think. And there is no freedom of thought without doubt.
-Bergen Evans

Love has reasons that reason knows nothing of.

If you don't control your mind, someone else will. -John Allston 

If you believe everything you read, better not read. -Japanese proverb 

I would never die for my beliefs because I might be wrong. 
-Bertrand Russell 

The Universe is full of magical things, patiently waiting for our wits
to grow sharper. -Eden Phillpotts

A great many people think they are thinking when they are merely
rearranging their prejudices. -William James

Error of opinion may be tolerated where reason is left free to
combat it. -Thomas Jefferson

Each of us literally chooses, by his way of attending to things, what
sort of universe he shall appear to himself to inhabit. -William James 

The most beautiful things are those that madness prompts and reason
writes. -Andre Gide

You can't think and hit at the same time. -Yogi Berra

You exchanged your faith for evidence. You stopped believing in what
you knew, and you started believing in what you saw. But you see,
faith is the evidence of what you can't see.

The whole problem with the world is that fools and fanatics are always
so certain of themselves, but wiser people so full of doubts.
-Bertrand Russell

A problem well defined is a problem half solved.
-Ralph Waldo Emerson

Millions saw the apple fall, but Newton was the one who asked why.
-Bernard M. Baruch

We attract hearts by the qualities we display; we retain them by the
qualities we possess. -Jean Baptiste Antoine Suard

The mind has exactly the same power as the hands: not merely to grasp
the world, but to change it. -Colin Wilson

To understand the heart and mind of a person, look not at what he has
already achieved, but at what he aspires to. -Kahlil Gibran

At the end of reasons comes persuasion. -Ludwig Wittgenstein

There are many things in life that will catch your eye, but only a few
will catch your heart... pursue those.

Common sense is the knack of seeing things as they are and doing
things as they ought to be done. -Josh Billing

Nothing is more fairly distributed than common sense: no one thinks he
needs more of it than he already has. -Descartes

The prudence of the best heads is often defeated by tenderness of the
best hearts. -Henry Fielding

The reasonable man adapts himself to the world while the unreasonable
man persists in trying to adapt the world to himself. Hence, all
progress depends on the unreasonable man. -G. B. Shaw