An Old Chestnut
The chestnut, like other nuts, is encased in two shells, an outer and an inner shell. The outside case is very rough, full of sharp thorns and stickers. In the proper season, when the rains and frost come they soften this outside burr, and when the sun shines on it the burr cracks open and folds out, and the chestnut falls from its rough encasement.
How true this may be said of the sinner!