Astronomy is useful because it raises us above ourselves; it is useful because it is grand; .... It shows us how small is man's body, how great his mind, since his intelligence can embrace the whole of this dazzling immensity, where his body is only an obscure point, and enjoy its silent harmony.
Henri PoincareIdeas rose in clouds; I felt them collide until pairs interlocked, so to speak, making a stable combination.
Henri PoincareOne does not ask whether a scientific theory is true, but only whether it is convenient.
Henri PoincareExperiment is the sole source of truth. It alone can teach us something new; it alone can give us certainty.
Henri Poincare