Killeth an ox. The Hebrew of this passage is very brief, and several interpretations are possible. There is no connective between the phrases; for example, the first unit reads, “the slaughterer of the ox the slayer of a man.” The connective supplied by the KJV, “as if,” and that supplied by the RSV, “like,” are based on the reading of the LXX and the Targums. Translated in this way the meaning would be that without the corresponding spiritual experience the offerer of an ox would be no more pleasing in the sight of God than a murderer. The other combination of phrases would express similar comparisons.
It is possible, however, to supply the connective “is” thus, “He that slaughtereth an ox is a murderer,” etc. This gives the meaning that those who came to worship God with oxen, lambs, oblations (cereal offerings), incense, were at the same time committing murder and engaging in idolatrous rites (see ch. 65:3-7).
Their own ways. The thought in this verse is related to that in the following verse. As these people have chosen their own wicked ways, God will “choose” punishments for them suitable to their iniquities.