The most brilliant of human philosophies behaves like a butterfly eluding the net of reality, like a bird soaring upwards in flight, always evading the practicalities of life.
A thought from Torah, however, sits above your head like a reservoir of living water. However ethereal it may be, it needs only a small opening to break its dam and pour forth its water.
Whatever section of Torah you study, whatever you know, do something with it. Make it real.