Kadin Job 42:3

You asked, ‘Who is this that obscures my plans without knowledge?’ Surely I spoke of things I did not understand, things too wonderful for me to know. (Job 42:3 NIV)

God knows what he's doing.  It's easy to thank him when things are good.   When things are tough....it's hard to understands like Job, however the truth is God owes us nothing so when you can't figure out the work of his hands - trust his heart for you.   He loves you - 

Trust him.