24-27
O you who believe! do not enter houses other than your own houses until you have asked for permission and greeted by invoking peace on the people living in them, that is better for you that you may be mindful.
Some intimate relatives and friends enter houses without seeking permission. If the inmates of the house are not in a presentable condition it will cause embarrassment to both.
24-30
Say to the believing men that they should keep their looks down and guard their private parts, that is purer for them. Allah is certainly informed of that which they do.
Illegal relationship between a man and a woman normally start through looks. If the very first act is checked i.e. if looks are kept down, it will avoid all subsequent acts.
24-31
And say to the believing women that they should keep their looks down and guard their private parts, and that they should not let their beauty be exposed, except that which appears thereof, and that they should draw their head covering over their bosoms and not let their beauty be exposed (by removing their head covering), except before their husbands or their fathers or fathers of their husbands or their sons or their husbands sons (through other wives) or their brothers or their brothers’ sons or their sisters’ sons or their women or those whom their right hands possess (slave girls) or male servants not having need (of women) or children who have no knowledge of hidden parts of women, and they should not strike their feet so as to make known that which is hidden of their beauty. And turn to Allah all together, O believers! that you may be made successful.
It is probably when women go out or have visitors at home that they should wear head covers covering their bosoms. They can move about without head covers in their houses before people living in the house listed in theverse. Inspite of the head cover a woman will not be able to hide her height or slimness etc. She is summarily advised not to attract the attention of men by exposing her beauty or in some other manner.
24-32
And arrange for the marriage of those among you who are single and the righteous among your male and female slaves (servants). If they are in poverty Allah will enrich them out of His grace and Allah is Omnipresent (Ample-giving), Knowing.
Instructions are given to arrange for the marriages of the unmarried, the widows and the slaves, male and female. Those who cannot afford to marry are advised to remain chaste. Slaves are to be freed and in addition given some money probably for starting some business. Slave girls are not to be forced into prostitution, they should be married as stated above in Verse 32 and also in Chapter:4 Verse 25.
24-35
Allah is the light of the skies and the earth. The likeness of His light is like an enclosure with one opening in which there is a lamp, the lamp is in a glass, the glass is as if it were a brilliant shining planet,(the lamp) is lit from a blessed olive tree, neither eastern nor western, whose oil is almost inflammable although fire has not (even) touched it, light upon light, Allah guides to His light whom He wills and Allah sets forth similitudes for mankind and Allah is the Knower of everything.
The word ‘Noor’ is used for moon light which does not contain heat like the sun light for which the word ‘Ziya’ is used Chapter:10 Verse 5. ‘Mishkaat’ is a shelf-like space in a wall or pillar. Misbaah means a lamp in which a fuel burns to give light and heat, in this case the fuel is a highly inflammable olive oil which is not localized. ‘Zujajah’means a glass and ‘Kawkab’ in view of its association with the sun and the moon (Chapter:12 Verse 4) would mean a planet. A planet is an opaque body reflecting light where as a star is self luminous like a lamp. ‘Durriyyun’ means shinning, therefore ‘Kawkabun Durriyyun’ would mean an opaqe planet reflecting light, like a mirror made of glass. In this similitude, it appears that the shelf – like space in a wall or a pillar is lined by mirrors which reflect the light of the lamp just like the head lights of a car, the bulb inside which is enclosed in a reflecting conical surface. In a closed room, there is light over light i.e. the reflected light added to the original light makes the environment very bright. We can see only through the reflected light. Moon light is the external ‘Noor’ and the guidance contained in the Quran is internal ‘Noor’ which gives rise to belief, certainty, piety etc. External Noor makes objects of this world clear whereas internal Noor makes the hereafter clear. Internal Noor sometimes radiates from the faces of pious people. This internal Noor is found in Mosques where Allah (SWT) is remembered day and night by men whom worldly occupations do not stop from His remembrance because of their fear of the consequence of evil and hope for their forgiveness and reward from Allah (SWT)
24-39
And (as for) those who do not believe, their deeds will be like a mirage in the desert, which the thirsty person supposes to be water until when he comes to it and finds it to be nothing, and finds Allah with him (to take his account of deeds), so He pays in full to him that which is due to him and Allah is Quick in (settling) the account.
The infidels feel that what they are doing is right. This is a deception like the optical illusion in the desert when the shining sand appears like water to a thirsty man. Likewise his deeds will be of no value and he will be punished for his sins. Infidelity is like intense darkness in the deep sea on a cloudy day when one cannot see even his own hand. These are the people for whom Allah (SWT) has not assigned light i.e. He has not guided them.