What are you most grateful to God for?

I'm leaning heavily towards Ephesians 1:4-6 and predestination while saying this, but thanking God for just choosing me to be with him before the creation of the world is something that overwhelms me all the time.

f he hadn't chosen me, everything including the Word becoming flesh, Jesus' sacrifice and resurrection, the Gospel and the dispensation of the Holy Spriit wouldn't matter. I know I shouldn't be really having these thoughts, but my heart breaks for all those people who aren't even chosen to be with him in the first place.