Thou puttest away all the wicked of the earth - Margin, “causest to cease.” Literally: “Dross ... thou makest all the wicked of the earth to cease.” They are seen by the psalmist as dross, and then he says that God had treated them as such.
Like dross - The “scoriae” of metals, or of a furnace. This dross is cast out as of no value. So the wicked are regarded by God.
Therefore I love thy testimonies - I love a law which condemns sin. I love a government which ferrets out and punishes the guilty. This is a leading object with all just governments; and this we approve in all governments. As the divine government makes this an object, and as it will accomplish this more perfectly than any other administration so it is more worthy of confidence than any other. As it is the only government that does this perfectly, so it is the only one that is worthy of unlimited confidence.