Luke indicated that Jesus said that as the lightning flashes (ὥσπερ γὰρ ἡ ἀστραπὴ ἀστράπτουσα) and lights up the sky (ἐκ τῆς ὑπὸ τὸν οὐρανὸν) from one side of the sky to the other (εἰς τὴν ὑπ’ οὐρανὸν λάμπει), so will the Son of man be (οὕτως ἔσται ὁ Υἱὸς τοῦ ἀνθρώπου) in his day (ἐν τῇ ἡμέρᾳ αὐτοῦ). Luke was the only Greek biblical writer to use the word ἀστράπτουσα that means to lighten and flash forth. There was something similar in Matthew, chapter 24:27, indicating a Q source, about the Son of Man coming like lightening, but in a more succinct way. In Matthew, Jesus said that as the lightning came from the east (ὥσπερ γὰρ ἡ ἀστραπὴ ἐξέρχεται ἀπὸ ἀνατολῶν) but flashed or shined in the west (καὶ φαίνεται ἕως δυσμῶν), so the Parousia or the second coming of the Son of Man would happen (οὕτως ἔσται ἡ παρουσία τοῦ Υἱοῦ τοῦ ἀνθρώπου). Wherever the corpse was (ὅπου ἐὰν ᾖ τὸ πτῶμα), there the vultures gathered (ἐκεῖ συναχθήσονται οἱ ἀετοί). The Son of Man was a clear reference to Jesus in his return, the Parousia, who would return like a flash of lightening. The vultures or eagles were a reference to the Roman soldiers with their eagle symbols. There was nothing about the corpses and the eagles or vultures here in Luke, just the lightning flash. However, later in this chapter, verse 37, there was a mention of the corpses and these vultures. Are you afraid of lightning?
Sirach now recalls the works of the Lord in nature. He was speaking about what he had seen. The works of the Lord were made by his word. This is in slight contradiction with the creative role of wisdom. Here it is the word of God that creates the world. All these creative things do the will of the Lord. Thus the sun lights up and glorifies the world. Thus you see the ancient inclination to make the sun a god. Just like today, we think that all things look so beautiful on a gorgeous sunny day. No one, not even the holy angels, can tell all about the marvelous works that the Almighty Lord has done. The universe stands as an example of his glory.
There is a strange expression about the bright face of Yahweh that lights up everything that is often repeated. They wanted to see some goodness or good things happen. Somehow the light from the face of Yahweh would shine on them in order to bring them happiness. This joy and happiness would then fill up their souls or hearts. This joy was greater than wonderful grain harvests and abundant wine supplies.