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

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.

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.

You become financially free when your passive income exceeds your expenses.

Passivity is fatal to us. Our goal is to make the enemy passive.

For me, the Immaculate Conception is the feast of ‘passive action,’ the action that functions simply by the transmission through us of divine energy.

Dr. King used Gandhi’s commitment to non-violence and to passive resistance.

To conjure with the passive culture and adapt to its rules is to degrade and deny the fullness of our meaning and intention.

I long to create something that can’t be used to keep us passive: I want to write a script about plumbing, how every pipe is joined to every other.

There is, of course, no joy so great as the cessation of pain; in fact all joy, active or passive, is the cessation of some pain, since it must be the satisfaction of a longing, even perhaps an unconscious longing.

We cannot be passive and silent towards those who reject God’s Word and our holy faith.