This is a hard teaching. Who is God-like except Christ ?
Who can love God with ALL heart, mind, soul, and strength ?
Since the standard is perfection, we all fail miserably.
Trying is still failure, although trying with diligence is commendable.
Will God reward my feeble efforts if I continuously fail in all my attempts ?
I agree with The Law in my mind, however I cannot obey perfectly.
But we must still try. We cannot do this on our own there is no doubt. But God hasn't left us alone. He has given us His Spirit to help us on the journey, He has also given us a Church, fellow Christians, and abundant grace as long as we ask Him for it.
You are right, Jesus has given us a very difficult command to follow. But like I said we still need to follow; and when we fail, well we get on our knees with humble and contrite hearts, and He will pick us up.
Looking back in my journey, I do see progress. When I was younger, sin had full control over me. My pride, lust, sloth, gluttony, anger, envy, and greed were overwhelming it seemed. I fell very often. And there were times where I just gave up, and realized that I couldn't do it. Of course the biggest reason, was even though I gave lip service to the fact that I couldn't overcome without God's grace, I wasn't using God's grace. I was acting like a Pharisee, trying to do it on my own.
At one point, God had to teach me a lesson. A hard earned lesson, but a needed lesson. And from that lesson, which took my hardheadedness about 10 years to learn, taught me real humility. Not the fake humility of before, but real humility.
At this point I really began see much progress. Those sins that used to overwhelm me, no longer did. The grievousness of those sins, began to disappear. Am I without sin today? No, but I no longer sin mortally; or least I haven't for quite some time now. Venial sins? Yes, but even those are not as frequent, especially the intentional ones. The unintentional ones, I am still working on; but I am seeing progress in my life.
My point that I am trying to make is this I did not really start making actual noticeable progress, until after I really really learned humility and that I needed and began to surrender myself to God truly. So when I look at those points that you made above, once I also believed that they were impossible; but today, I see in them possibility.
From my study of what is called ascetical theology (a theology that most modern folks know nothing about) I have learned that a human being on the journey to being actually Christ-like, goes through stages. There are two primary stages which I think is alluded to discussion between Jesus and the Rich Young Man in the Gospels. Remember that the rich young man ask Jesus, what he needed to do to inherent eternal life. What did Jesus say to him? Keep the commandments. But Jesus added a little of what we call down in Louisiana some lagniappe (which means something more than what you asked for), when He said, "but to be perfect sell all that you have and give it to the poor and follow Me." So from this we get what we NEED to get into heaven; and what we NEED to do to be perfect. Two stages.
Anyway I think that the far majority of people remain in the first stage their entire lives, maybe getting a taste of the second stage here and there. But I do believe that there are some who if they are willing, God is willing; that move into that second stage. And these men and women, come from all walks of life. And we have evidences of these men and women who have achieved high levels of Sanctity. We call them Saints, with a big "S".
The second stage is has three primary substages, which are called the purgative, illuminative, and the unitive ways. I will leave it at that. I don't really have time to right a book on these. If you really are interested just PM me, and I can give you some titles of some great books to read that may open up some possibilities for you.