Passage from Sovereign Grace, “Chapter VI: Grace for Living” by D. L. Moody (1837-1899):

“I cannot but believe that the reason of the standard of Christian life being so low, is that we are living on stale manna. You know what I mean by that. So many people are living on their past experience—thinking of the grand times they had twenty years ago, perhaps when they were converted. It is a sure sign that we are out of communion with God if we are talking more of the joy, and peace, and power, we had in the past, than of what we have to-day. We are told to “grow in grace;” but a great many are growing the wrong way.

You remember the Israelites used to gather the manna fresh every day: they were not allowed to store it up. There is a lesson here for us Christians. If we would be strong and vigorous, we must go to God daily and get grace. A man can no more take in a supply of grace for the future than he can eat enough to-day to last him for the next six months; or take sufficient air into his lungs at once to sustain life for a week to come. We must draw upon God’s boundless stores of grace from day to day, as we need it."