Over the last few days I have been fascinated by the following passage in Acts (emphasis added):
Being then God's offspring, we ought not to think that the divine being is like gold or silver or stone, an image formed by the art and imagination of man. The times of ignorance God overlooked, but now he commands all people everywhere to repent, because he has fixed a day on which he will judge the world in righteousness by a man whom he has appointed; and of this he has given assurance to all by raising him from the dead. Acts 17:29-31
Repentance is not optional. God commanded it, because he has fixed a day where he will judge the world.
I wonder whether (and if so, when) it is appropriate to emphasise this.