If I have seen further it is by standing on the shoulders of Giants.
I do not know what I may appear to the world, but to myself I seem to have been only like a boy playing on the seashore, and diverting myself in now and then finding a smoother pebble or a prettier shell than ordinary, whilst the great ocean of truth lay all undiscovered before me.
Tact is the knack of making a point without making an enemy.
Men build too many walls and not enough bridges.