Of course, everybody needs comfortable sleep, about 8 hours per day. My experience says that we should go to rest whenever our body and mind urges for it. But some sleeps are ill-fated. and may lead to irreversible damage. My experience says that if I feel strongly urged for sleep, so that I cannot resist it, I should do nothing but resist it! Then, after some time, that urge loses its intensity and I can go to bed and experience a refreshing sleep. As you need to sleep, sometimes you need not to sleep! That may be a signal for potential bad events that are going to happen!