We ourselves feel that what we are doing is just a drop in the ocean. But the ocean would be less because of that missing drop.
Children are a house's enemy. They don't mean to be - they just can't help it. It's their enthusiasm, their energy, their naturally destructive tendencies.
Espionage, for the most part, involves finding a person who knows something or has something that you can induce them secretly to give to you. That almost always involves a betrayal of trust.