Those who boast of their knowledge betray their ignorance. Knowledge is not a possession to be proud of, since it brings with it so great a responsibility that a nurse might as well be proud of watching over a life in peril. Knowledge may become good or ill according to the use which is made of it. If men know God, for instance, and then glorify him as God, and are thankful, their knowledge has become the means of great blessing to them; but if they know God, and fail to glorify him, their knowledge turns to their condemnation. There is a knowledge which does not puff up the mind, but builds up the soul, being joined with holy love. Did not our Lord say, “And this is life eternal, that they might know thee the only true God, and Jesus Christ, whom thou hast sent”? But for men to know God, and not to glorify him as God, and to be unthankful, is, according to our text, no benefit to them: on the contrary, it becomes a savour of death unto them, because it leaves them without excuse. Our Saviour could plead for some, “Father, forgive them, for they know not what they do.” But what plea is to be used for those who know what they do, and yet do evil; who know what they ought to do, and do it not? These have the light, and close their eyes; or, to use another figure, they have the light, and use it to sin by. They take the golden candlestick of the sanctuary into their hands, and by its help they perform their evil deeds the more dexterously, and run in the way of wickedness the more swiftly.
Charles Spurgeon
The Metropolitan Tabernacle Pulpit Sermons, vol. 30 (London: Passmore & Alabaster, 1884), 61. Vol. 30, Sermon No. 1,763; Titled: Knowledge, Worship, Gratitude Click here for a free PDF of this sermon.
The Old Guys 
Matthew Henry – Quick To Listen, Slow To Speak
12 Apr19 Know this, my beloved brothers: let every person be quick to hear, slow to speak, slow to anger; 20 for the anger of man does not produce the righteousness of God. – James 1:19-20
3. This may be understood as referring to the disputes and differences that Christians, in those times of trial, were running into among themselves: and so this part of the chapter may be considered without any connection with what goes before. Here we may observe that, whenever matters of difference arise among Christians, each side should be willing to hear the other. People are often stiff in their own opinions because they are not willing to hear what others have to offer against them: whereas we should be swift to hear reason and truth on all sides, and be slow to speak any thing that should prevent this: and, when we do speak, there should be nothing of wrath; for a soft answer turneth away wrath. As this epistle is designed to correct a variety of disorders that existed among Christians, these words, swift to hear, slow to speak, slow to wrath, may be very well interpreted according to this last explication.
~Matthew Henry~
Matthew Henry’s Commentary on the Whole Bible: Complete and Unabridged in One Volume (Peabody: Hendrickson, 1994), 2410.
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