Because the light from each post falls in such quick succession upon the eye, that it cannot distinguish one post from another.
Can objects be seen distinctly when placed near the eye?
No; when objects are within six inches of the eye they cannot be seen distinctly.
Can objects be seen when at a great distance from the eye?
Yes; objects may be seen even when millions of miles away from us; thus, the sun is seen although ninety-five millions of miles from the earth, and some of the stars which we behold in the heavens, are still farther away than the sun.
Of what use is the eye to us?
The eye gives us ideas of the size, the shape, the color, the place, the distance, and the movements of things around us, so that we can use them the better to promote our comfort and our happiness.
What may we remember about the light?
And God said, “Let there be light;” and there was light. Thus the day was separated from the night, and the sun was made to send forth his silvery rays upon hill and valley, field and forest, causing the rarest buds and most beautiful blossoms to come forth from the lifeless earth, although no eye, save the All-Seeing One, was there to behold them!
