People will work harder for appreciation than for criticism, because appreciation feeds the one hunger almost everyone shares: to feel important.
But it only works when it’s sincere. Flattery is cheap because it’s about your goal, not their reality. People sense manipulation fast, and once they do, trust leaks out of every future interaction.
Honest appreciation is specific. It notices effort, character, improvement, restraint—things that are real and often overlooked. It treats the person like a person, not a tool.
If you want someone to grow, catch the parts worth reinforcing. If you want someone to cooperate, acknowledge what they’ve already contributed. Respect is not a compliment you hand out when convenient; it’s the tone you use before you ask for anything.
The secret is simple: make people feel valued without lying. That changes the atmosphere more than any clever argument.