What happens, very often unconsciously, is that there are friends who are very devoted to each other, and then there is something in the machinery that goes wrong. Perhaps neither of them knows this, but unconsciously the spirit of their friendship is destroyed; and it is most difficult to mend it. Then there is no joy of friendship any more. Friendship lasts only as long as that delicate thread exists, as long as the machinery is in proper order. Besides, all the external things of life, money, power, position, or comfort, are nothing in comparison with the condition of one's spirit. If the spirit is disturbed none of these things has any value whatever; it is all lost.