Excess (ghulūw) in honoring the Messenger ﷺ means elevating him to divinity or granting attributes proper to Allah alone. Diminution (taqṣīr) means reducing the established rank of prophethood and messengership.
The Messenger ﷺ is Allah’s servant and Messenger. Servanthood excludes divinity; messengership affirms his exalted prophetic office.
The balanced position neither denies prophetic rank nor passes beyond the proper bounds of human servanthood and messengership.