If the denier denies His power to do this, he impugns the perfection of His power; if he denies His kindness in doing so, he impugns the perfection of His mercy and kindness. It is thus clear that sending a messenger is among the greatest proofs of the perfection of His power and kindness. Power and kindness are attributes of perfection, not deficiency.

As for punishing those who reject the message, this falls within the divine decree, owing to the wisdom He has in doing so.