Now, when the soul is in this attitude, divine light comes streaming in and fills the whole body. Hence it follows that if the body is not full of light, the eye is not single; there is some mixed motive; self-will or self-interest is at work; we are not upright before God. In this case, any light which we profess to have is darkness; and there is no darkness so gross or so terrible as that judicial darkness which settles down upon the heart governed by self-will while professing to have light from God. This will be seen in all its horrors by and by in christendom, when "that Wicked shall be revealed, whom the Lord shall consume with the spirit of His mouth, and shall destroy with the brightness of His coming; even him, whose coming is after the working of Satan with all power and signs and lying wonders, and with all deceivableness of unrighteousness in them that perish; because _they received not the love of the truth_, that they might be saved. And _for this cause_ God shall send them strong delusion, that they should believe a lie; that they all might be damned who believed not the truth, but _had pleasure in unrighteousness_." (2 Thess. ii. 8-12.) How awful is this! How solemnly it speaks to the whole professing church! How solemnly it addresses the conscience of both the writer and the reader of these lines! Light not acted upon becomes darkness.--"If the light which is in thee be darkness, how great is that darkness!" But on the other hand, a little light honestly acted upon is sure to increase; for "to him that hath shall more be given," and "the path of the just is as the shining light, that shineth more and more unto the perfect day." This moral progress is beautifully and forcibly set forth in Luke xi. 36.--"If thy whole body therefore be full of light, having _no part dark_"--no chamber kept closed against the heavenly rays--no dishonest reserve--the whole moral being laid open, in genuine simplicity, to the action of divine light; then "the whole shall be full of light, as when the bright shining of a candle doth give thee light." In a word, the obedient soul has not only light for his own path, but the light shines out, so that others see it, like the bright shining of a candle. "Let your light so shine before men, that they may see your good works, and glorify your Father which is in heaven."