Why is Trust So Hard?

I was inspired to study TRUST this morning as I read my scriptures-something I am trying to have more of right now.  I wonder at times why it is so hard for me to trust the Lord when I can look back in my life and see His hand so apparent? Even right at this moment, I see His hand.

​ Why then is it so hard to lay my future at His feet? Why can I see so perfectly the past, and yet I fear what is ahead, knowing in my heart that when the future does come, I will see once again that everything worked out and I will be reminded, yet again, that God truly can make good of a lot of things and that He is in the details of our lives.  
I flipped open my latest book, Nephi's Handbook for a Happy Life, and read one of my favorite quotes that brought me peace: