Blessings in Disguise?

These lines are from a song that has been especially precious to me recently:

What if trials of this life
The rain, the storms, the hardest nights
Are your mercies in disguise

'Cause what if your blessings come through raindrops
What if Your healing comes through tears
What if a thousand sleepless nights are what it takes to know You're near
What if trials of this life are Your mercies in disguise

photo © 2009 Leland Francisco | more info (via: Wylio)Songwriter Laura Story relates the story behind the song:  “Life is filled with things you don’t expect, but the Bible tells us to respond by trusting God and continuing to worship him. ...  Don’t get the wrong idea.  It hasn’t been easy,” Laura admits.  “Everyone wants to be a mature and equipped follower, but would I have signed up had I known what it would take?  God has grown us up, deepened our faith, our awareness of our great need for him as a savior, daily.  We knew it before, but we didn’t see it.  This is a good place to be.”

I don't understand why God is allowing me to go through cancer treatment and depression at the same time.  I know He has a purpose, and usually I am able to let go by trusting in that knowledge.  This time--maybe because I'm just so worn out--I feel like David:

  How long, LORD? Will you forget me forever?
  How long will you hide your face from me? (Psalm 13:1, New International Version)

In those times I am trying to remember something I've heard:  When you don't understand the Why, go back to the Who:  Who is in control.  Who knows me, loves me, and watches over me.  Who will bring me through this.  Who hears my prayers and gives me the grace and endurance that I need.

I'm trying to keep just one Why:  Why should I rely on my own fragile, imperfect self when I can trust in the Almighty God of the universe?