For many years I missed this truth. I believed all the other prepositions: Christ for me, with me, ahead of me. And I knew I was working beside Christ, under Christ, with Christ. But I never imagined that Christ was in me. I can’t blame my deficiency on Scripture. Paul refers to this union 216 times. John mentions it 26. They describe a Christ who not only woos us to himself but “ones” us to himself.
Max Lucado
Grace: More Than We Deserve, Better Than We Imagine, Thomas Nelson, 2012, 9.
GraceQuotes.com 
I can relate,In my case,I didnt see it because I felt like I was so in unworthy, but the more you understand about love,grace,mercy,etc. the depth and such,the more you see and experence it.
It is difficult to see because the majority of our christian culture bombards us with messages based on law. We are heavily focused on behavior modification instead of Jesus and our sufficiency in His sufficiency. We are taught a gospel that is not based on his finished work at the cross. The tide is turning and the Good News of Christ is being preached more and more.