ὡς δ' ἂν ᾖ θέλημα ἐν οὐρανῷ οὕτως ποιήσειThis, of course, is echoed in the Lord's Prayer:
Whatsoever be the will in heaven, so it will be done. (1 Maccabees 3:60)
γενηθήτω τὸ θέλημά σου, ὡς ἐν οὐρανῷ καὶ ἐπὶ γῆς.The hope is that the will of heaven will happen on earth, which does not seem likely to be the case most of the time. This life is a time when terrible things happen on earth. Men do terrible things to each other. Sometimes these terrible things are feigned to be the will of heaven. I have a hard time believing that firing a single mother who has done nothing wrong, for example, and leaving her without means of support is really the will of heaven. (James 1:27 argues against such a perverse notion.) What this means is that after two thousand years the Lord's Prayer is still valid.
May thy will happen, as in heaven, so also on earth. (Matthew 6:10)