Matthew 26:41; Mark 14:38; Romans 8:13; 1 Corinthians 9:27
The Persians had an annual festival when they slew all the serpents and venomous creatures they could find; but they allowed them to swarm as fast and freely as ever until the festival came round once more. It was a poor policy. Sins, like serpents, breed quickly, and need to be constantly watched.