What Does It Mean That God Is Our Righteousness?

As the darkness that shrouded Russia under Communism began to lift, thousands of people began to search for their spiritual roots.  The following letter was sent to a fellow Christian broadcaster: "I do not know how to address you, that is, I do not know your name; but I do not think that is important. The fact is that I want to know definitely whether there is a God or are you just deceiving the people. If you are as certain about God's existence as you preach and sing about Him, then I straightway would want to believe in Him the same way as you do." The listener then begged for a Bible so he could read the record for himself.