What keeps your heart firm in Islam?

Assalamu alaikum! I've been going through some ups and downs with my iman lately-I know deep down Islam is the truth, but sometimes certain things feel confusing, and I guess that's just me being human and not grasping everything. I'd love to hear what personal proofs or experiences you've discovered that strengthen your faith, because we’re not meant to follow blindly. Sure, I'm aware of the prophecies and scientific miracles, but I’m looking for those deep personal insights or philosophical reflections that really anchor the soul-the kind of wisdom you'd want to pass on to your kids one day.