This noun means evidence or proof, something that demonstrates truth or reality. In 2 Thessalonians 1:5, Paul calls the believers' patient endurance under persecution 'manifest token of the righteous judgment of God.' Their suffering proves God's justice, both in honoring their faithfulness and in judging their persecutors. Classical usage shows ἔνδειγμα was used for tokens or evidence of goodwill or truth. Paul transforms suffering into evidential value, revealing divine purposes.