You really can't justify anything else but giving your whole attention to spiritual formation in Christ.
Dallas WillardIn thus sending out his trainees, [Jesus] set afoot a perpetual world revolution: one that is still in process and will continue until God's will is done on earth as it is in heaven.... He has chosen to accomplish this with and, in part, through his students.
Dallas WillardThe Bible, of course, is not a theology book. It is certainly not a philosophy book. So we have to derive the meaning of terms from the context in use.
Dallas Willard