The title indicates a desire to live in relationship with Christ--to be united with Him, to have His Life, His Blood flowing through you.
It is my desire to continually live in His heartbeat, so that not only is my heart beating completely in sync with His and totally consumed by Him, but that others would also be drawn into deeper intimacy with Him.
And this is the Lord's heartbeat--to draw everyone into deeper intimacy with Him, to become the true Bride of Christ.