Note 18 at Php 1:24: Paul had a vision of heaven that made him long to go there, yet he was remaining in his physical body for the sake of others. Most people are clinging to this physical life for selfish reasons. Paul was clinging to it for totally unselfish reasons. Only when people lose their lives (die to self and live for Christ and others) do they truly find out what life is all about (Mt 10:39).