she considered the possibility of telling her about everything that was happening, but then she changed her mind; people never learn anything by being told; they have to find out for themselves.
Come let us mock at the great That had such burdens on the mind And toiled so hard and late To leave some monument behind, Nor thought of the leveling wind.
In the matter of physics, the first lessons should contain nothing but what is experimental and interesting to see. A pretty experiment is in itself often more valuable than twenty formulae extracted from our minds.