Intelligence may be seen as a mastery of a series of life’s compromises. One must be versed extensively in the extremes of all spectrums and be comfortable working for short periods of time in them. The key is finding the perfect location between the extremes while maintaining the ability to become the epitome of either end.
I think that in an ideal lifestyle, one should be both mentally and physically tired when laying down to sleep each night. I have no evidence to support this, but I am sure it is more healthy to push both the body and mind daily. In addition to being healthy, one can also accomplish more by doing so.