Dealing all day with difficult, high-maintenance colleagues is depleting. Maintaining a compliant façade around a leader you don’t respect is depleting. Excessive multitasking is depleting. Trying to persuade people to agree with you when they are inclined to oppose you is depleting. So is trying to make people like you when they are predisposed to dislike you. Suppressing your opinions—or for that matter, engaging in any effort to control your emotions around others—is depleting.