1. By the Sky and the Night-Visitant (therein)
6067. The appeal here is to single Sign, viz.: the Sky with its Night. Visitant; and the substantive proposition is in verse 4: "There is no soul but has a protector over it". In the last Sura we considered the persecution of Allah's votaries, and how Allah protects them. Here the same theme is presented in another aspect. In the darkest sky shines out most brilliantly the light of the most brilliant star. So in the night of spiritual darkness- whether through ignorance or distress shines the glorious star of Allah's revelation. By the same token the man of Faith and Truth has nothing to fear. Allah will protect His own.
6068. This is explained in verse 3 below. The "Star of piercing brightness" is understood by some to be the Morning Star, by others to be the planet Saturn, by others again to be Sirius, or the Pleiads or shooting stars. I think it is best to take the "Star" in the collective or generic sense, for stars shine on every night in the year, and their piercing brightness is most noticeable on the darkest night.