An interesting promise from God.

This verse seems to be direct towards those who think they know better than God.  Those who think they can create their own truth and light.

God says different.

Isaiah 50:11(NKJV)

    Look, all you who kindle a fire,     Who encircle yourselves with sparks:     Walk in the light of your fire and in the sparks you have kindled—     This you shall have from My hand:      You shall lie down in torment.

Notice that the "God of Peace" makes a promise that is anything but peaceful to those who think they know better than He does.