1 John 2:11

Verse 11. But he that hateth his brother.

In this case the reverse is true. Occasion for stumbling is ever present. Here there is no light, all is darkness, and one hating his brother is walking in darkness; and so long as hatred for the brother remains, the darkness remains. Such an one can not know which way he goes; that is to say, the miserable end of such a course of life and conduct, being contrary to Christ's teachings and example, it can only result in failure of that reward promised to the faithful disciples, and will end only in ultimate condemnation.

Darkness hath blinded his eyes.

That is, the eyes of his understanding. He can not see the many dangers that beset him on every side. Safety only is assured in being governed by Christ in his commands. Doing as he did, obeying what he commands, is walking in the light; any other course is certain destruction, so far as Christan character and success are concerned.