C.H. Spurgeon warns against the danger of underestimating sin, emphasizing that even Christians can become desensitized to its seriousness. He illustrates how seemingly small sins can lead to significant consequences, comparing them to little foxes that spoil grapes and tiny insects that can cause great destruction. Spurgeon reminds us that sin is not trivial; it caused immense suffering to Jesus, who bore the weight of our transgressions. He urges believers to view all sin as exceedingly sinful, as it ultimately led to the crucifixion of our Savior. By recognizing the true nature of sin, we can cultivate a deeper aversion to it and a greater appreciation for Christ's sacrifice.

Beware of light thoughts of sin. It is sadly true, that even a Christian may grow by degrees so callous, that the sin which once startled him—no longer alarms him in the least. We palliate and excuse our sin; we throw a cloak over it; we call it by dainty names. Sin, a little thing? Is it not a poison! Who knows its deadliness! Sin, a little thing? Do not the little foxes—spoil the grapes? Does not the tiny coral insect—build a rock which wrecks a navy? Do not little strokes—fell lofty oaks? Will not continual droppings—wear away stones? Sin, a little thing? It girded your Redeemer's head with thorns—and pierced His heart! It made Him suffer anguish, bitterness, and woe! Could you weigh the least sin in the scales of eternity—you would fly from it as from a serpent, and abhor the least appearance of evil. Look upon all sin as that which crucified your Savior—and you will see it to be "exceeding sinful."