I have been crucified with Christ and I no longer live, but Christ lives in me.  The life I now live in the body, I live by faith in the Son of God, who loved me and gave himself for me.  ~Galatians 2:20 

What Paul is saying is that our life can be its best, be the most fruitful when it looks like Christ when we take on His nature.   

But how can we do that, how do we look more like Christ, I think its wrapped up in Paul's first statement:   "we must die to the old man or the old self,"  the sin nature must begin to have less of a footprint in our lives.

If our lives are to be fruitful, to be blessed, to be what God intended we must learn to die daily to our old nature and become alive in Christ.  Jesus said it John 12:24:

"unless a grain of wheat falls into the ground and dies, it remains alone; but if it dies, it produces much grain."   

Today learn to surrender your life and you will find the living God always intended for you.