The Greek adverb gnēsiōs (γνησίως) means genuinely, sincerely, or in a legitimate manner. Derived from gnēsios (genuine, true-born, legitimate), it describes authentic rather than performed or feigned behavior. It appears once in the New Testament (Philippians 2:20), where Paul says Timothy will 'genuinely care' for the Philippians' welfare.
Paul's use of gnēsiōs to describe Timothy's care is a pointed contrast: 'I have no one else like him, who will genuinely care for your welfare — everyone looks out for their own interests, not those of Jesus Christ.' Authentic ministry — gnēsiōs — is rare because it requires caring more about others than about one's own interests. This is the sacrificial spirit of Christ himself, who did not come to be served but to serve. Gnēsiōs marks the difference between professional religious service and genuine pastoral love.