To act without knowledge is folly, to know without acting is cowardice.
Peace is not something to say but something to do.
There is perhaps no surer road to peace than the one that starts from little islands and oases of genuine kindness, islands and oases constantly growing in number and being continually joined together until eventually they ring the world.
Let us not speak of tolerance. This negative word implies grudging concessions by smug consciences. Rather, let us speak of mutual understanding and mutual respect.