“The better educated we are and the more acquired information we have, the better prepared shall we find our minds for making great and fruitful discoveries.”

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.

The terrain is everything; the germ is nothing.

The joy of discovery is certainly the liveliest that the mind of man can ever feel.

The experimenter who does not know what he is looking for will not understand what he finds.

A man of science rises ever, in seeking truth; and if he never finds it in its wholeness, he discovers nevertheless very significant fragments; and these fragments of universal truth are precisely what constitutes science.

We must never make experiments to confirm our ideas, but simply to control them.

Everything is poisonous, nothing is poisonous, it is all a matter of dose.

Effects vary with the conditions which bring them to pass, but laws do not vary. Physiological and pathological states are ruled by the same forces; they differ only because of the special conditions under which the vital laws manifest themselves.

Priestley said that each discovery we make shows us many others that should be made.

With the aid of these active experimental sciences man becomes an inventor of phenomena, a real foreman of creation; and under this head we cannot set limits to the power that he may gain over nature through future progress of the experimental sciences.

The minds that rise and become really great are never self-satisfied, but still continue to strive.

But while I accept specialization in the practice, I reject it utterly in the theory of science.

Science does not permit exceptions.

All the vital mechanisms, varied as they are, have only one object, that of preserving constant the conditions of life in the internal environment.

A fact in itself is nothing. It is valuable only for the idea attached to it, or for the proof which it furnishes.

Put off your imagination, as you put off your overcoat, when you enter the laboratory. Put it on again, as you put on your overcoat, when you leave.

We are in a wrong state of mind if we are not in a thankful state of mind.

Picture yourself in your minds eye as having already achieved this goal. See yourself doing the things you’ll be doing when you’ve reached your goal.

Let your cares drive you to God. I shall not mind if you have many of them if each one leads you to prayer. If every fret makes you lean more on the Beloved, it will be a benefit.

Under pressure, you can win with your mind.

In any case, I married Feroze Gandhi. Once I get an idea in my head, no one in the world can make me change my mind.

Secure property in hand leads to peace in mind.

The free exploring mind of the individual human is the most valuable thing in the world.

Everything you and I will ever have will come to us as the result of the way we use our minds, the one thing we possess that makes us different from all other creatures.