[Pooya/Ali Commentary 67:21] Sustenance refers to all that is necessary to sustain and develop life in all its phases, physical and mental as well as spiritual. If man follows obstinate impulses of rebellion and impiety and persists in indulging in wasteful, ostentatious and vain use of the sustenance made available to him he will ultimately meet his perdition. Verse 73 of Nahl says that sustenance is provided to man from the heavens and the earth. According to Ali Imran : 169 and Hajj: 58 the soul receives sustenance even after the death of the body. Death is not cessation of life. Life continues. See commentary of Dhariyat: 5 and 6. Those who give their lives in the cause of Allah live with Him (see Baqarah: 154).