Some people feel active and stimulated shortly after waking. Those are the ones who are able to live more strongly in the soul sphere. People who tend to live more in the bodily nature often sense a certain fatigue in the morning. The less tired a person is in the morning, the more active he can be.
Source: Rudolf Steiner – GA 140 – Life Between Death and Rebirth: VIII – Vienna, January 21, 1913
Translated by Rene Querido