While a mortal sin is a mortal sin, there may be other factors in determining whether one is worse than another. Certainly, from the viewpoint of a victim, I think sins definitely vary in their degree. If I am a single man and I masturbate, I commit mortal sin, but who, other than me, is a victim? If I am a married man with a family and I commit adultery, my sin has many victims, although it falls in the same class of mortal sin as the previous. If I commit purgury under oath to save my own skin, it may be a mortal sin, but if I commit purgury and implicate an innocent person in a crime, it is a much worse sin.
I think we’ve worked our way up to the truly intended purpose of The knowledge of Eternal Law… We have reached the point for why it was written.
When we become influenced by relativist ideologies, we run the risk of heresy, in that we begin to rationalize sin according to the material values of nature -as if it were an ends. But the material values of nature (natural law) were not set up as our end but as a guide whose purpose is to establish order.
As Catholics, we’ve been Ordained to participate in Gods Eternal Law, which is timeless. Without time there is no beginning or ends, so this could explain why Jesus said that it is a mortal sin to even mentally lust over a woman -because in heaven, there is no time for our thoughts to develop into acts… time and nature will not exist anymore to us as our guides.
So as Catholics we have been given a bit more knowledge than what nature alone is capable of… We are actually above natural law, but not to the level of eternal… Those who follow relativist ideologies as their sole guide to values lack vital knowledge. They need our prayers.
Just as a thought -is it possible that when Jesus said one sin is worse than another, He was meaning that it was worse for our sake, and not necessarily in terms of gravity… After all, a sin against the Holy Spirit means our acceptance of grace has been compromised. That would certainly make it worse in that respect.
newadvent.org/cathen/09076a.htm
“According to St. Thomas, the natural law is “nothing else than the rational creature’s participation in the eternal law” (I-II.94). The eternal law is God’s wisdom, inasmuch as it is the directive norm of all movement and action.”
" if we are not to be irreverent in our concept of God, but to represent Him as best we can, we must try to conceive Him as excluding all, even the least, change or succession; and his duration, consequently, as being without even a possible past or future, but a never beginning and a never-ending, absolutely unchangeable “now.”** This is how eternity is presented in Catholic philosophy and theology.**"