G'day
For me it is the Lord's command .... it is a reminder ... it is His spiritual presence and a means of our becoming 'one' - becoming part of each other as Jesus outlined in John 13-17 .... we in Him, and He is us.
So it also connects me with all other believers ... we are one in Christ.
It is a mystery .... but it brings heaven very near.
blessings
dcl