So too the Spirit comes to our aid and bears us up in our weakness; for we do not know what prayer to offer nor how to offer it worthily as we ought, but the Spirit Himself goes to meet our supplication and pleads in our behalf with unspeakable yearnings and groanings too deep for utterance.
---This is from an Amplified Topical Reference Bible [which I love!], but I have omitted the typical parenthetical definitions and etc to avoid confusion.
I have struggled with depression for most of my life. God created me this way to struggle with this issue. I do not understand why, and probably never will. I choose to put my faith in Him anyway, and to love Him regardless of what my life brings. He is my Savior, and my life belongs to Him.