This is like giving warning to a truant young man who has...
This is like giving warning to a truant young man who has left school or university saying that those who escape from intellect and knowledge will go finally to jail, and asking them: "Which is better, going to jail or gaining the high ranks?" Some points: In the above verses, one time it is said that Paradise is perpetual (khuld) as a quality for it, and one time it is said that the people of the Paradise are perpetual (khalidin).
This is for stating this fact that both Paradise and its inhabitants are everlasting. The sentence "For them there will be therein whatever they desire ..." is the opposite point of what is said about the people of the Hell in the 54th verse of Sura Saba, which says: "And a gulf is set between them and that which they desire..." Using the Qur'anic word /masir/ (the place of return) occurring after the word /jaza/ (reward), concerning the Paradise is an emphasis on what is found in the concept of /jaza'/ (reward) and all of them are the opposite point of the people of the Hell that have been mentioned in the verses before it: "...
they are cast, coupled in fetters, into a narrow place of that Fire ..." The sentence "... It is for your Lord a promise that must be fulfilled." refers to this matter that the believers have prayed Allah for Paradise with all its blessings. They are seekers and Allah is sought of to provide, as we read in verse 194 of Sura 'al-i-'Imran, No. 3: " Our Lord!
And give us what You have promised us through Your messengers ..." All believers ask Allah such a thing mutely, for everyone who obeys His commandment has such a mute appeal. The angels also ask Allah such a thing for the believers; as we read in Sura Al-Mu'min, No. 40, that they say about the believers "Our Lord!
And make them enter the Gardens of Eden which you have promised them..."[^1] There is another commentary here indicating that the Qur'anic word /mas'ulan/ is an emphasis on certainty of Allah's promise. It implies that this promise is so bound to be fulfilled that believers can demand it from Allah. It is like the time that we promise a person and we also know his right to have a claim. But there is no problem that the word /mas'ulan/ includes all these meanings.