{Set your mind on} (phroneite). "Keep on thinking about."
It does matter what we think and we are responsible for our
thoughts. {Not on the things that are upon the earth} (m(8820)ta epi
t(8873) g(8873)). Paul does not mean that we should never think the
things upon the earth, but that these should not be our aim, our
goal, our master. The Christian has to keep his feet upon the
earth, but his head in the heavens. He must be heavenly-minded
here on earth and so help to make earth like heaven.