“In teaching man, experimental science results in lessening his pride more and more by proving to him every day that primary causes, like the objective reality of things, will be hidden from him forever and that he can only know relations.”

The doubter is a true man of science: he doubts only himself and his interpretations, but he believes in science.

Obervation is a passive science, experimentation is an active science.

The investigator should have a robust faith – and yet not believe.

The fact that knowledge endlessly recedes as the investigator is about to grasp it is what constitutes at the same time his torment and happiness.

If I had to define life in a single phrase, I should clearly express my thought of throwing into relief one characteristic which, in my opinion, sharply differentiates biological science. I should say: life is creation.

First causes are outside the realm of science.

The great experimental principle, then, is doubt, that philosophic doubt which leaves to the mind its freedom and initiative, and from which the virtues most valuable to investigators in physiology and medicine are derived.

A great discovery is a fact whose appearance in science gives rise to shining ideas, whose light dispels many obscurities and shows us new paths.

A discovery is generally an unforeseen relation not included in theory.

Well-observed facts, though brought to light by passing theories, will never die; they are the material on which alone the house of science will at last be built.

Particular facts are never scientific; only generalization can establish science.

Men who believe too firmly in their theories, do not believe enough in the theories of others. So these despisers of their fellows make experiments only to destroy a theory, instead of to seek the truth.

The true worth of an experimenter consists in his pursuing not only what he seeks in his experiment, but also what he did not seek.

The mental never influences the physical. It is always the physical that modifies the mental, and when we think that the mind is diseased, it is always an illusion.

Science increases our power in proportion as it lowers our pride.

When we meet a fact which contradicts a prevailing theory, we must accept the fact and abandon the theory, even when the theory is supported by great names and generally accepted.

Life is a never-ending school, and the really important lessons all tend to teach man his proper relation to the environment where he must live.

The trouble with institutional investors is that their performance is usually measured relative to their peer group and not by an absolute yardstick. This makes them trend followers by definition.

Domestic happiness is the end of almost all our pursuits, and the common reward of all our pains. When men find themselves forever barred from this delightful fruition, they are lost to all industry, and grow careless of all their worldly affairs. Thus they become bad subjects, bad relations, bad friends, and bad men.

The truth has never been of any real value to any human being – it is a symbol for mathematicians and philosophers to pursue. In human relations kindness and lies are worth a thousand truths.

Let your thoughts be related to what to want in life. They are the seeds, and your dream is the fruit.

Let your thoughts be related to what to want in life. They are the seeds, and your dream is the fruit.

I have always admired my mother’s style. For as long as I can remember, her style has been classic, elegant and something I have related to.

Muhammadan law in its relation to women, is a pattern to European law. Look back to the history of Islam, and you will find that women have often taken leading places – on the throne, in the battle-field, in politics, in literature, poetry, etc.