The grace of God is found between the saddle and the ground. His grace is available to those with the courage to jump on a horse and risk falling off.
Great deeds are usually wrought at great risk.
Keep the faculty of effort alive in you by a little gratuitous exercise every day. That is, be systematically ascetic or heroic in little unnecessary points, do something every day or two something for no other reason than that you would rather not do it, so that when the hour of dire need draws nigh, it may find you not unnerved and untrained to stand the test.