What Aspect of Our Catholic Faith Do You Struggle With the Most?

We are all humans wired differently by God. We all have our own opinions that make us unique. As a result, I am genuinely curious of what specific aspect of our Catholic faith do you struggle with the most... i.e. Divorce, Sex, Role of Mary and Saints, etc... As always, please be charitable. I'm not looking for debates, rather that each of you consider sharing something about our faith that you struggle with and perhaps why. I think it is always good to get new perspectives on things. God Bless!