We cannot weaken the flesh: but we can, and we MUST, strengthen the spirit, so that it may subdue and control, the flesh. To begin with, we are ALL flesh: "fulfilling the desires of the flesh and the mind," like the beast of the field, knowing nothing better or higher. We build the strength of the spirit by the intense love of God. There is no other way. And love of God, in effective strength, comes by much study and meditation on His Word. The one great command of life is: "Love the Lord thy God with ALL thy heart, ALL thy mind, ALL thy life, and ALL thy strength." This is not a command in the ordinary sense of a requirement by someone else for their purposes and benefit. Rather it is divine loving advice on the only possible way of escape out of death into life. An intense, life-dominating love of God is the only power in the universe that can overcome the flesh, and the promise of God's glorious eternal future is only to "him that overcometh."