I the Lord do keep it; I will water it every moment: Lest any hurt it, I will keep it night and day. (Isaiah 27:3)
When the Lord Himself speaks in His own proper person rather than through a prophet, the word has a peculiar weight to believing minds. It is Jehovah Himself who is the keeper of His own vineyard; He does not trust it to any other, but He makes it His own personal care. Are they not well kept whom God Himself keeps?
We are to receive gracious watering, not only every day and every hour “but every moment.” How we ought to grow! How fresh and fruitful every plant should be! What rich clusters the vines should bear!
But disturbers come; little foxes and the boar. Therefore, the Lord Himself is our Guardian, and that at all hours, both “night and day.” What, then, can harm us? Why are we afraid! He tends, He waters, He guards; what more do we need?
Twice in this verse the Lord says, “I will.” What truth, what power, what love, what immutability we find in the great “I will” of Jehovah! Who can resist His will? If He says “I will,” what room is there for doubt? With an “I will” of God we can face all the hosts of sin, death, and hell. O Lord, since Thou sayest, “I will keep thee,” I reply, “I will praise Thee!”
C.H. Spurgeon, Faith’s Checkbook