"It is difficult to know at what moment love begins; it is less difficult to know it has begun. A thousand heralds proclaim it to the listening air, a thousand messengers betray it to the eye. Tone, act, attitude and look, the signals upon the countenance, the electric telegraph of touch - all these betray the yielding citadel before the word itself is uttered, which, like the key surrendered, opens every avenue and gate of entrance, and renders retreat impossible."

By Henry Wadsworth Longfellow (1807-1882).