There have been a great many attempts to explain what the spots upon the sun really are. One theory is, that the solar orb is surrounded by a luminous atmosphere, and that the spots are open spaces in that atmosphere through which we see the solid surface of the sun. I cannot see any reason why that theory should not be the truth; and, if it be so, it seems to me to explain the first chapter of Genesis, where we are told that God created the light on the first day, though he did not make the sun until the fourth day. Did he not make the light first, and then take the sun, which otherwise might have been a dark world, and put the light on it as a luminous atmosphere? The two things certainly might very well fit in with each other; and if these spots are really openings in the luminous atmosphere through which we see the dark surface of the sun, they are admirable illustrations of the spots that men see in us. We are clothed with holiness as with a garment of light; but every now and then there is a rift through which observers can see down into the dark body of natural depravity that still is in the very best of us. It is a dangerous thing to look at the sun with unprotected eyes. Some have ventured to look at it with glasses that have no coloring in them, and they have been struck blind. There have been several instances of persons who have inadvertently neglected to use a proper kind of glass before turning the telescope to the sun, and so have been blinded. This is an illustration of our need of a Mediator, and of how necessary it is to see God through the medium of Christ Jesus our Lord; else might the excessive glory of the Deity utterly destroy the faculty of seeing God at all. The effect of the sun upon the earth, I shall not dwell upon now, as that may rather concern another branch of science than astronomy. It will suffice to say that living plants will sometimes grow without the sun, as you may have seen them in a dark cellar; but how blanched they are when existing under such circumstances! What must have been the pleasure with which Humboldt entered into the great subterranean cave called the Cueva del Guacharo, in the district of Caraccas! It is a cavern inhabited by nocturnal, fruit-eating birds, and this was what the great naturalist saw: "Seeds, carried in by the birds to their young, and dropped, had sprung up, producing tall, blanched, spectral stalks, covered with half-formed leaves; but it was impossible to recognize the species from the change in form, color, and aspect, which the absence of light had occasioned. The native Indians gazed upon these traces of imperfect organization with mingled curiosity and fear, as if they were pale and disfigured phantoms banished from the face of the earth."