There is a delicacy in friendship, in all kinds of relationship; there is delicacy in meeting people. If that delicate thread is damaged or moved out of place something goes wrong. There is no more delicate machinery than the spirit of man. How careful man is with his electrical machinery! Every little wire is looked at with a magnifying glass, and every little part of it is guarded so carefully and kept so clean that no rust can come on it; no one may touch it! At the same time man has no regard for his spirit, which is the most delicate machinery of all. Once it goes wrong it may never get right again; and it is very easy for it to go wrong, while it is most difficult to repair it. For other machinery we can get spare parts, but not for this machinery when once it is broken, when once something of it is lost. And when one thinks of all the illnesses and disagreeable experiences of the outer life, what about the spirit? When once the spirit is disturbed then the whole universe is disturbed for that person.