A very small cause, which escapes us, determines a considerable effect which we cannot ignore, and we say that this effect is due to chance.
Henri PoincareIt is the harmony of the diverse parts, their symmetry, their happy balance; in a word it is all that introduces order, all that gives unity, that permits us to see clearly and to comprehend at once both the ensemble and the details.
Henri Poincare[T]he different branches of Arithmetic - Ambition [G]eometry is not true, it is advantageous.
Henri PoincareIf we ought not to fear mortal truth, still less should we dread scientific truth. In the first place it can not conflict with ethics? But if science is feared, it is above all because it can give no happiness? Man, then, can not be happy through science but today he can much less be happy without it.
Henri Poincare