We are to admit no more causes of natural things than such as are both true and sufficient to explain their appearances.

It is indeed a matter of great difficulty to discover, and effectually to distinguish, the true motions of particular bodies from the apparent; because the par…

Every body continues in its state of rest, or of uniform motion in a right line, unless it is compelled to change that state by forces impressed upon it.

I do not define time, space, place, and motion, as being well known to all. Only I must observe, that the common people conceive those quantities under no othe…

Penser, c'est voir! me dit-il un jour emporte par une de nos objections sur le principe de notre organisation. Toute science humaine repose sur la deduction, q…

I have not been able to discover the cause of those properties of gravity from phenomena, and I frame no hypotheses;' for whatever is not deduced from the phen…

The truly privileged theories are not the ones referring to any particular scale of size or complexity, nor the ones situated at any particular level of the pr…