One of St. John’s favorite words is the Greek verb menos which is usually translated as “abide” or “remain” or “continue.” He uses this word more than all other New Testament writers together and it is one of the richest words in his theological vocabulary. When he uses this word in reference to a person, it suggests a deeply personal and constant union. It would thus be contrasted with a contact that may be intense but which soon fades and has no lasting effect.
To abide in Jesus is to be attached to him in such a way that life would seem impossible without him; Abide in me as I abide in you. Just as the branch cannot bear fruit by itself unless it abides in the vine, neither can you unless abide in me (15:4). To be detached from Jesus is to live a shadow life that has no real meaning and benefits no one in a permanent way It is a waste of precious time.
A Mystical Portrait of Jesus
Demetrius R. Dumm, OSB