The sixth commandment, "Thou shalt not commit adultery," includes having
delight in adulteries and having no delight in marriages, and in
particular cherishing filthy thoughts respecting such things as pertain
to marriage, for these are adulteries.

The seventh commandment, "Thou shalt not kill," includes not hating the
neighbor nor loving revenge; for hatred and revenge breathe murder.

The eighth commandment, "Thou shalt not bear false witness," includes
not to lie and blaspheme; for lies and blasphemies are false
testimonies.

The ninth commandment, "Thou shalt not covet thy neighbor's house,"
includes not wishing to possess or to divert to oneself the goods of
others against their will.

The tenth commandment, "Thou shalt not covet thy neighbor's wife, his
man-servants," and so on, includes not wishing to rule over others and
to subject them to oneself, for the things here enumerated mean the
things that are man's own. Anyone can see that these eight commandments
relate to evils that must be shunned, and not to goods that must be
done. (A.E., n. 935.)

But many, I know, think in their heart that no one can of himself shun
these evils enumerated in the Decalogue, because man is born in sins and
has therefore no power of himself to shun them. But let such know that
anyone who thinks in his heart that there is a God, that the Lord is the
God of heaven and earth, that the Word is from Him, and is therefore
holy, that there is a heaven and a hell, and that there is a life after