When our focus/affections are diverted from Christ, misery seeps in and ruins our joy. In this new estate, we don’t feel like doing anything but wallowing in self-pity and self-induced misery (encouraging others is no longer top-of-mind). (cp. Php 3:13-14)
The genius of Satan is this: he’s shifted the idea of integrity from integrity to Truth to integrity to feelings. The prior leads to freedom, the latter bondage.