Remember constantly that the light of your soul, of your thoughts, and of your heart, comes from Jesus Christ. He is the "Light of the eye" of our heart—not like the light that comes from the sun, that appears and disappears, and does not penetrate through an opaque substance, but leaves many things in darkness, and cannot enlighten one single soul in the darkness of sin, but He is the " true Light, which lighteth every man" (that is, the principal part of his being, the soul) "that cometh into the world."
It shines even in the darkness of sin, but sinful human darkness, or, rather, the men living in the darkness of sin, do not understand It, "comprehend It not;" they do not guess that the light which is in their souls is from Christ, and think that it is their own natural light; that they themselves, by means of their natural intellect, their own sagacity and judgment, have attained to a certain truth, have accomplished certain work; they do not think that it is only by " the light of Christ that they see every light," the light of every noble science, of every noble art, and of every thing.
Yes, the light of Christ enlightens all, even the heathens. "A light to lighten the Gentiles."
St John of Kronstadt