Philippians 1:21 NKJV - "For to me, to live is Christ, and to die is gain."
This verse puts the whole of the Christian life into one phrase: "For me to live is Christ..." Once we received the Lord Jesus Christ into our lives as our Savior and Lord we experienced the dynamic and powerful impact of being born again into God's family! We now have Christ living in us! Galatians 2:20. And that is basically how our Christian life is to be lived - Christ living His life in the Christian.
Someone once said something like this: "There are a lot of people trying to live a life they don't have while there are many Christians who have a life they don't live!" So many unsaved people try to live like a Christian but they don't have the indwelling Christ to give them that life! Then, on the other hand, there are so many saved people who have the indwelling Christ living in them but they don't let Him! How's that? For many Christians there's too much "self"! This is why Jesus said in Luke 9:23, "...If anyone desires to come after Me, let him deny himself..." If we would get "self" out of the picture Jesus could shine through our lives! (More about this in a future study).
What does it mean, "...to die is gain."? Think about it - being with Christ face to face and enjoying the eternal blessings of heaven is far greater than our earthly life could ever be! That's why a Christian in love with Jesus yearns for the day when God "calls them home!"