The wise speak only of what they know

Don't put a lump of rock under my elbow again!

The burned hand teaches best.

I don't know, and I would rather not guess.

So comes snow after fire, and even dragons have their endings.

For I am the daughter of Elrond. I shall not go with him when he departs to the Havens: for mine is the choice of Luthien, and as she so have I chosen, both the sweet and the bitter.

For I am Saruman the Wise, Saruman Ring-maker, Saruman of Many Colours!' I looked then and saw that his robes, which had seemed white, were not so, but were woven of all colours, and if he moved they shimmered and changed hue so that the eye was bewildered. I liked white better,' I said. White!' he sneered. 'It serves as a beginning. White cloth may be dyed. The white page can be overwritten; and the white light can be broken.' In which case it is no longer white,' said I. 'And he that breaks a thing to find out what it is has left the path of wisdom.' - Gandalf