This passage is part of a sermon by C.H. Spurgeon in 1866, and so it is a not a simple read, but will benefit any who will put in the time to understand.
It is a sorrowful fact that many who are spiritually alive greatly need reviving. It is sorrowful because it is a proof of the existence of much spiritual evil. A man in sound health with every part of his body in a vigorous condition does not need reviving. He requires daily sustenance, but reviving would be quite out of place. If he has not yet attained maturity, growth will be most desirable, but a hale hearty young man wants no reviving, it would be thrown away upon him. Who thinks of reviving the noonday sun, the ocean at its flood, or the year at its prime? The tree planted by the rivers of water loaded with fruit needs not excite our anxiety for its revival, for its fruitfulness and beauty charm every one. Such should be the constant condition of the sons of God. Feeding and lying down in green pastures and led by the still waters they ought not always to be crying, “my leanness, my leanness, woe unto me.” Sustained by gracious promises and enriched out of the fullness which God has treasured up in his dear Son, their souls should prosper and be in health, and their piety ought to need no reviving. They should aspire to a higher blessing, a richer mercy, than a mere revival. They have the nether springs already; they should earnestly covet the upper springs. They should be asking for growth in grace, for increase of strength, for greater success; they should have out-climbed and out-soared the period in which they need to be constantly crying, “Wilt thou not revive us again?” For a church to be constantly needing revival is the indication of much sin, for if it were sound before the Lord it would remain in the condition into which a revival would uplift its members. A church should be a camp of soldiers, not an hospital of invalids. But there is exceedingly much difference between what ought be and what is, and consequently many of God’s people are in so sad a state that the very fittest prayer for them is for revival.