The mind has no leisure; it is perhaps worrying, or planning, or thinking over the struggles and anxieties of which life is so full. There is hardly ever a time when the mind is at rest, except when nature gives it a rest because it is too exhausted to work any more. The mind says, "I will have a good sleep." And if it has two hours" sleep only, still one wakes up with such joy and strength that all the world seems new. If there have been dreams, one can only say that one has been asleep, but one does not feel rested, because that part of the being has not had any rest.