There are good days AND bad days. Keep going, and you’ll find both.
When I’m not doing well, it sometimes seems like these bad things are all that have ever existed and all that will ever exist. But that’s not true! Good days will come again.
Conversely, sometimes when I’m doing well, I think that I’m finally at an idealized “better” place and that my life will be perfect from now on. That’s not true either. There will always be hard times, easier times, neutral times, happier times, sadder times, etc., throughout life. When I expect things to be more perfect than is realistic, it a) makes me stressed about the good times ending because I know deeper down that I won’t be able to keep up with these expectations, and b) makes me crash harder when I start to feel worse again.
Reminding myself of the duality and accepting both the good and the bad helps me to keep a more balanced perspective.