Comforts and syphilis are the greatest enemies of mankind.

Comforts and syphilis are the greatest enemies of mankind.

All great men are gifted with intuition. They know without reasoning or analysis, what they need to know.

The love of beauty in its multiple forms is the noblest gift of the human cerebrum.

Everyone makes a greater effort to hurt other people than to help himself.

The most efficient way to live reasonably is every morning to make a plan of one's day and every night to examine the results obtained.

A few observation and much reasoning lead to error; many observations and a little reasoning to truth.

Life leaps like a geyser for those who drill through the rock of inertia.

Religion brings to man an inner strength, spiritual light, and ineffable peace.

Like hatred, jealousy is forbidden by the laws of life because it is essentially destructive.

Those who desire to rise as high as our human condition allows, must renounce intellectual pride, the omnipotence of clear thinking, belief in the absolute power of logic.

To what extent is any given man morally responsible for any given act? We do not know.

The atmosphere of libraries, lecture rooms and laboratories is dangerous to those who shut themselves up in them too long. It separates us from reality like a fog.

Man cannot remake himself without suffering, for he is both the marble and the sculptor.

All of us, at certain moments of our lives, need to take advice and to receive help from other people.

The first duty of society is to give each of its members the possibility of fulfilling his destiny. When it becomes incapable of performing this duty it must be transformed.

Science has to be understood in its broadest sense, as a method for comprehending all observable reality, and not merely as an instrument for acquiring specialized knowledge.

In man, the things which are not measurable are more important than those which are measurable.

Intuition comes very close to clairvoyance; it appears to be the extrasensory perception of reality.

Hard conditions of life are indispensable to bringing out the best in human personality.

The quality of life is more important than life itself.

Gigantic sums are now required to maintain prisons and insane asylums and protect the public against gangsters and lunatics. Why do we preserve these useless and harmful beings? The abnormal prevent development of the normal.

Perhaps I will stay in Chicago and operate on human beings instead of on dogs. From a business standpoint, it would be excellent. But, as I hate medical practice, I would like better to make little money in doing scientific work than a great deal in doing surgical operations.

The Asiatics and the Africans, such as the Russians, the Arabs, the Hindus, are increasing with marked rapidity. Never have the European races been in such great peril as today.

The German government has taken energetic measures against the propagation of the defective, the mentally diseased, and the criminal.

The difficulty of finding organs suitable for transplantation on man must be met.

The most efficient way to live reasonably is every morning to make a plan of ones day and every night to examine the results obtained.

But this is a true saying among men: the gifts of enemies are no gifts and profitless.

The Prophet defeated the enemies of Islam even when he and his followers were small in number.

The man of knowledge must be able not only to love his enemies but also to hate his friends.

There are no enemies in science, professor. Only phenomena to study.

A man can't be too careful in the choice of his enemies.

We will remember not the words of our enemies, but the silence of our friends.

Be assured those will be thy worst enemies, not to whom thou hast done evil, but who have done evil to thee. And those will be thy best friends, not to whom thou hast done good, but who have done good to thee.

Our most bitter enemies are our own kith and kin. Kings have no brothers, no sons, no mother!

Keep your enemies in front of you.

As a matter of self-preservation, a man needs good friends or ardent enemies, for the former instruct him and the latter take him to task.

Am I not destroying my enemies when I make friends of them?

Many have had their greatness made for them by their enemies.

It is not enough for me to win. My enemies must lose.

Comforts and syphilis are the greatest enemies of mankind.

I'm just grateful to be on this planet. I have no enemies that I know of. I'm just the guy who makes happy.

Men are by nature merely indifferent to one another; but women are by nature enemies.

He has no enemies, but is intensely disliked by his friends.

We are at war with enemies that still have the intent to do further damage to Americans at home and abroad.

I no doubt deserved my enemies, but I don't believe I deserved my friends.

Often we have no time for our friends but all the time in the world for our enemies.

Not only the bull attacks his enemies with curved horn, but also the sheep, when harmed fights back.

Friends come and go but enemies accumulate.