He is able who thinks he is able.
Buddha

A man should look for what is, and not for what he thinks should be.
Albert Einstein

Many a man thinks he is buying pleasure, when he is really selling himself to it.
Benjamin Franklin

A man is but the product of his thoughts what he thinks, he becomes.
Mohandas Gandhi

If someone thinks that love and peace is a cliche that must have been left behind in the Sixties, that's his problem. Love and peace are eternal.
John Lennon

Part of me suspects that I'm a loser, and the other part of me thinks I'm God Almighty.
John Lennon

He who learns but does not think, is lost! He who thinks but does not learn is in great danger.
Confucius

The superior man thinks always of virtue; the common man thinks of comfort.
Confucius

People do not like to think. If one thinks, one must reach conclusions. Conclusions are not always pleasant.
Helen Keller

He can who thinks he can, and he can't who thinks he can't. This is an inexorable, indisputable law.
Pablo Picasso

I busted a mirror and got seven years bad luck, but my lawyer thinks he can get me five.
Steven Wright

A fool thinks himself to be wise, but a wise man knows himself to be a fool.
William Shakespeare

He that is giddy thinks the world turns round.
William Shakespeare

My sorrow, when she's here with me, thinks these dark days of autumn rain are beautiful as days can be; she loves the bare, the withered tree; she walks the sodden pasture lane.
Robert Frost

A man is what he thinks about all day long.
Ralph Waldo Emerson

The soul never thinks without a picture.
Aristotle

It is what a man thinks of himself that really determines his fate.
Henry David Thoreau

There is only one class in the community that thinks more about money than the rich, and that is the poor. The poor can think of nothing else.
Oscar Wilde

Power always thinks... that it is doing God's service when it is violating all his laws.
John Adams

Power always thinks it has a great soul and vast views beyond the comprehension of the weak.
John Adams