Spurgeon on "The Minister's Fainting Fits"

I opened yesterday's sermon on David's Despair (1 Samuel 26-27) by citing the opening lines of Charles Spurgeon's classic article in his Lectures to My Students on "The Minister's Fainting Fits":

As it is recorded that David, in the heat of battle, waxed faint, so may it be written of all the servants of the Lord. Fits of depression come over the most of us. Usually cheerful as we may be, we must at intervals be cast down. The strong are not always vigorous, the wise not always ready, the brave not always courageous, and the joyous not always happy. There maybe here and there men of iron, to whom wear and tear work no perceptible detriment, but surely the rust frets even these; and as for ordinary men, the Lord knows, and makes them to know, that they are but dust.

JTR