Life to a wise person is music; and in that symphony he has to play a certain part. If one were feeling so low that one's heart was sounding a lower pitch, and the demand of life at that moment was that one should voice a higher pitch, then one would feel that one had failed in that music in which one was meant to play one's part fittingly. This is the test by which you can distinguish the old soul and the child soul. The child soul will give way to every feeling; the old soul will strike the higher note in spite of every difficulty.