They said, ‘I am rich.’ Maybe they meant this even materially.
It is possible we do not know these things. It is possible that you are a believer, and you are saved, and you have repented, and you have known new life and received the new nature, but you have slipped into an nominal, formal way of living. You are not hot, and committed, and enthusiastic, and concerned for souls. Maybe that has happened and you cannot see it. Maybe you cannot see yourself even as others see you, let alone as the Lord sees you, because this lukewarmness makes us blind.