Although to penetrate into the intimate mysteries of nature and thence to learn the true causes of phenomena is not allowed to us, nevertheless it can happen that a certain fictive hypothesis may suffice for explaining many phenomena.
You measure a democracy by the freedom it gives its dissidents, not the freedom it gives its assimilated conformists.
It is not enough to be a good player, you must also play well.
Too many young people itch for what they want without scratching for it.