“The friend of the bridegroom”
The bride belongs to the bridegroom. The friend of the bridegroom stands and listens for him, and is overjoyed to hear the bridegroom's voice. That joy is mine, and it is now complete. He must increase; I must decrease. (John 3:29–30 BSB)
What it sounds like today
A wedding metaphor about stepping aside.
The cultural key
The 'friend of the bridegroom' (shoshbin) was a defined office: the trusted friend who negotiated the match, managed the wedding arrangements, escorted the bride, and stood guard, his job complete the moment he heard the bridegroom's voice arriving. Claiming the bride himself was the one unthinkable betrayal of the role. John's disciples have just complained that everyone is defecting to Jesus; John answers with the org chart of a village wedding: the bride was never mine.
Recovered meaning
John names his own role with precision and joy: architect of the introduction, not rival for the bride. 'He must increase, but I must decrease' is not deflation; it is the shoshbin's job description fulfilled, the happiest sentence a best man can say.