I'm a light sleeper. I've never been one of those people who can put their head down and suddenly everything disappears. Nighttime is the time I get most scared anxious or worried. In those darker moments before waking or sleeping is when I feel most I don't know I can turn on myself and my imagination can take me dark places.
Anyone who stops learning is old whether at twenty or eighty. Anyone who keeps learning stays young. The greatest thing in life is to keep your mind young.