The primary point of DBT is basically to learn to control one’s emotions without stifling them, for instance bottling up suicidal thoughts rather than talking to people about them and analyzing the true reasons one is feeling suicidal, rather than allowing that suicidal ideation to consume oneself.

Depression hits. Hard. Suddenly you start hating yourself. What the fuck?

There’s a reason. There’s always a reason. To deduce those reasons, though, we have to practice mindful thinking - easier said than done. “I am depressed and hating myself. Am I feeling guilt? Have I slept enough? Is said undersleep facilitating fatigue, which in turn is facilitating the overall depression?”

Let’s say in this specific instance the core issue is indeed lack of sleep. One must learn to understand that those emotions stem from a source, they do not come from nowhere. Those emotions are also a natural response to this stimulus, and one should not feel guilt for feeling this way. One should allow that emotion to occur and pass as others do rather than attempting to shut it out, and this one in particular should get some damn sleep.

The point is to pinpoint stimuli and accept the emotional repercussions as natural and surmountable rather than all-consuming and inherently negative.

I hope this made some semblance of sense. There are more in-depth explanations online. Another tactic is emotional inversion - a specific instance I use this tactic with is the sun. I’m a vampire and I hate the heat. With the proper thought process, you can learn to love it - the sweat, the weight of the air if it’s really humid, the beauty of the sun’s mere existence and the fact that it is the true wellspring for life on Earth - suddenly the heat isn’t so uncomfortable, it is human, it is animal, it is plant, it is life.