They may teach us the goodness of God, in giving us a world so full of beauty; and we should feel ever thankful to Him for the great pleasure that we have in seeing them.
Why cannot we see the light of a lamp or candle distinctly, in the day-time?
Because the strong rays from the sun hide the more feeble rays from the lamp.
Why cannot we see the stars in the day-time?
Because the bright light from the sun hides their more feeble light.
When can we see the glow-worms or fire-flies best?
At night, when it is dark; because, at other times, the light of the sun hides their feeble light.
Where may we see them at night?
Flying about in all directions, looking like bits of fire moving in the air.
Does a looking-glass reflect all the colors of light falling upon it?