Paul told Timothy about a coming apostasy where some would prohibit certain things God had blessed man with. He explained that "those who believe and know the truth" (1 Timothy 4:3) partake in these things, knowing they are from the Lord. The phrase, "those who believe and know the truth," speaks of one class of people, but provides nuance. Knowing is not enough. Believing is more than knowing, but not lacking in it. We must not only know, but believe.