But if they turn away (inspite of all your exhortation) then (it is their own responsibility). We have not sent you as a custodian over them. Your duty is only to deliver (Our Message) well. Look! when We let a person to have a taste of Our mercy he rejoices over it. But if some evil befalls them on account of what they have themselves done (they are displeased thereat); as a matter of fact such a person is (really) ungrateful.