Luke 13:9 And if it bear fruit, well: and if not, then after that thou shalt cut it down.
Jesus tells a story about a fruit tree that is not bringing forth fruit. If it is not going to bear fruit then it is just wasting space. He will cut it down.
He gives the worker extra time to cultivate and fertilize to make it bring forth fruit but if it will not then there is not need to have it wasting space.
Paul, in the book of Philippians, says that the only reason for him to stay on this earth was to bear fruit. If not for being useful to the Lord and His work it would be better for him to go on to Heaven.
Are you bearing fruit? Do you count that as a vital part of your life?