wandering in my mind

Revelation 22:2b - AND THE LEAVES OF THE TREE ARE FOR THE HEALING OF THE NATIONS.

To put it simple, I want to be a healer of nations. Of course, knowing full well that Jesus is the absolute healer, I want to walk alongside Him and be used to heal nations. What does that mean? I know bits and pieces but to comprehend it fully, I think I might need to be in the hereafter. The leaves of the tree are for the healing of the nations...Lord, I pray for more insight as to what that means. What does it look like? Where's my place in it? I can't stand to think that I would live a mediocre life only concerned with myself. I refuse to forget the things that are on your heart. I refuse to look away and pretend I don't see hurting people. I refuse to be satisfied with the status quo. I refuse to be satisified until I awake in Your likeness (Psalm ?). I want to be like Abraham who believed when you spoke to him and it was credited to him as righteousness. I want to be a healer. Simply put, I want you.