I've often heard the analogy that when God heals our hearts and minds, it's like an onion.
It doesn't happen all at once. Instead, God peels back our hurts and memories, the things that caused us pain, layer by layer.
He heals one part, and then, as we are stronger from the previous healing, He can go deeper and heal another area.
I've heard this. I've believed this. I've even written about it. Still, I must admit that I was completely surprised when the Holy Spirit began healing another layer of my heart in the spring.