John 1:9

That was the true Light, which lighteth every man that cometh into the world.

The sense of this verse, which in itself, under divine teaching, is as plain as any portion of the word of God, by the perversion or ignorance of men, is brought forward to strengthen the opinion of those who profess that all men are endued with an inward light, which, they say, is sufficient for all the purposes of religion. And this they advance in direct opposition to what the Lord Jesus himself hath said, that the light which is in a man may be altogether darkness. And in consequence hath left upon record this solemn precept, Take heed therefore, that the light which is in thee be not darkness! Matthew 6:23; Luke 11:35. But John's account of Christ in this verse is both plain and obvious. If we accept the words as referring to mere natural light, nothing can be more true than that Christ, as the Great Creator and Author of nature, lighteth every man that cometh into the world with all the understanding which in nature that man hath. And if we refer the expression to the light of grace, equally certain it is, that every man that cometh into the world who is enlightened by grace, must derive it wholly from Christ. So that Christ is the Author and Giver of both. And it is clearly in this sense the Apostle meant it. For it should be observed, that the Evangelist is here advancing the glory of Christ, and not of the glory of man.