Acts 17:30-31

30Therefore God overlooked and disregarded the former ages of ignorance; but now He commands all people everywhere to repent [that is, to change their old way of thinking, to regret their past sins, and to seek God’s purpose for their lives],

31because He has set a day when He will judge the inhabited world in righteousness by a Man whom He has appointed and destined for that task, and He has provided credible proof to everyone by raising Him from the dead.”