If you can cultivate wholesome mental states prior to sleep and allow them to continue right into sleep without getting distracted, then sleep itself becomes wholesome.
Thus did I keep my person fresh and new,
My presence, like a robe pontifical,
Ne'er seen but wondered at, and so my state,
Seldom but sumptuous, showed like a feast.
Anyone in a state of seeking can never be happy. Only those who are constantly finding are fulfilled. And finding is not something that happens to us - it is something we do.
The Truth-power must be brought down from above into that state of peace, and this higher power - Parashakti - will directly guide the vehicle - ādhāra - and transform it.