So, then, what should have been defined by the OP so we'd all start on the same page:
What is sin, anyway?
Can we agree that Jesus presents the example of a life without sin, and that a life short of the perfection of Jesus is what it means to "miss the mark?" So how did Jesus live His life?
Jesus gave them this answer: "Very truly I tell you, the Son can do nothing by himself; he can do only what he sees his Father doing, because whatever the Father does the Son also does.
And we are told:
Do not conform to the pattern of this world, but be transformed by the renewing of your mind. Then you will be able to test and approve what God's will is--his good, pleasing and perfect will.
Sin is failing to do what is in the Mind of God for us to do, each and every decision each and every day. The Mind of God contains every day of perfection for each of us: What we should do each moment from the moment we wake up to the moment we go to sleep. Any action we make during the day that does not conform to what is contained in the Mind of God for that day "misses the mark."
Don't you know that when you offer yourselves to someone as obedient slaves, you are slaves of the one you obey--whether you are slaves to sin, which leads to death, or to obedience, which leads to righteousness?
A lot of people think there is such a thing as a "neutral" act, but not so if Jesus is the example of sinless perfection. To be sinless and perfect, every decision, every act, must be only what we see the Father doing, and that can only happen when our minds are perfectly conformed to the Mind of God so that we can determine God's pleasing and perfect will for every act, every day, all day long.
Sinless perfection is to have done what Jesus would have done, and what Jesus would have done is what is in the Mind of the Father--what would therefore be in the Mind of the Son and what would be in our mind if our minds were conformed to His mind.
For we are God's handiwork, created in Christ Jesus to do good works, which God prepared in advance for us to do.
Most of us never even ask, "God, what do you want me to do today?" God certainly knows--He had prepared the to-list for each of our days before creation, just as Jesus had a to-do list for every day.
This is why Moses was warned when he was about to build the tabernacle: "See to it that you make everything according to the pattern shown you on the mountain."
How many of us go to sleep asking God for a vision of what our next day should be?
...your will be done, on earth as it is in heaven.
How many of us ask, "Show me your pattern of my tomorrow, show me what you have done in Heaven, and I will do it on earth?"
Who in this discussion claims to have lived this day just as Jesus would have lived it?
Anything and everything short of that "misses the mark."