The Lord's words in today's Gospel reading from John 15 are powerful. Jesus said to his disciples, "I am the vine, you are the branches. Whoever remains in me and I in him will bear much fruit, because without me you can do nothing. Anyone who does not remain in me will be thrown out like a branch and wither; people will gather them and throw them into a fire and they will be burned." Jesus was not talking about doing things for your own sake; to be fruitful is to do what glorifies God. How to be sure that you are one of his branches? Seek to attain union with him is the assured way to go.