While working in his garden, a man admired the large, green, healthy-looking squash plant outside his house. The stems appeared to be strong, and the leaves were large. But a few days later he noticed that the plant was terribly wilted, and within a couple of days the squash plant was completely dead. Pulling up the plant and examining its roots, he discovered that a bore worm, which could not be seen from the outside, had eaten the heart out of the stem of the plant. Hidden sin, like the bore worm, can eat away the heart of one's Christian experience and leave him spiritually dead.