“Those who have an excessive faith in their theories or in their ideas are not only poorly disposed to make discoveries, but they also make very poor observations.”

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.

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.

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.

1 billion of excess cash flow coverage through 2017 and the Access cash flows, along with our major new fee based projects continue to dramatically reduce exposure to commodity prices.

Would Americans accept if we decided to come here and decide who your rulers should be? So why do you expect us Iranians to accept the idea that the United States shall come in there and decide who shall govern us?

There is nothing more imprudent than excessive prudence.

If a man has a weak arm, give him a heavy hammer to exceed himself!

An excess of childhood is the germ of a poem.

Honors achieved far exceed those that are created.

The passions are like fire, useful in a thousand ways and dangerous only in one, through their excess.

When your memories exceed your dreams, the end is near.