H.P. Barker gives a graphic illustration that points up the need for both knowing and applying the Bible's truth.
As I looked out into the garden one day, I saw three things. First, I saw a butterfly. The butterfly was beautiful, and it would alight on a flower and then it would flutter to another flower and then to another, and only for a second or two it would sit and it would move on. It would touch as many lovely blossoms as it could, but derived absolutely no benefit from it. Then I watched a little longer out my window and there came a botanist. And the botanist had a big notebook under his arm and a great big magnifying glass. The botanist would lean over a certain flower and he would look for a long time and then he would write notes in his notebook. He was there for hours writing notes, closed them, stuck them under his arm, tucked his magnifying glass in his pocket and walked away. The third thing I noticed was a bee, just a little bee. But the bee would light on a flower and it would sink down deep into the flower and it would extract all the nectar and pollen that it could carry. It went in empty every time and came out full.
-A. Naismith, 1200 Notes, Quotes and Anecdotes, Chicago: Moody, 1962, p. 15