Are God's standard and will impossible? Are they unreasonable?
No sister, His standards are not impossible, as Christ so clearly exhibited. Neither are they unreasonable or even all that difficult, as Paul declared when He said "His commandments are not burdensome." Or "grievous" as other translations state.
Christ was completely human and completely God, but while of the seed of Adam, he did not carry Adams sin nature, or in other words, He was not born with original sin. The Son of Man, or Son of Adam was His favorite title for Himself. He is also called the last Adam. He carried Adams genes, but not his fallen nature, as do we. He was also filled with the Holy Spirit from Jordan all the way to Calvary. Most of us would be blessed just to walk in the Spirit all the way to church and back.
I'm not trying to steal your joy, or accuse you of any sin. Only to warn you against this foolishness. We have a new nature, a new heart, a new mind and we are crucified with Christ, seated with Him in heavenly places etc. But sadly, we have this new nature in an earthly temple called the flesh.
Christ was the only Son of Adam who's earthly body would not see corruption, because it could not. We are not so fortunate. When our bodies give out our Spirits will rise to be one with God's Spirit, but our corrupted flesh will rot in the ground.
Of the world, the flesh and the devil, our greatest enemy is by far the flesh, which is why it needs to be nailed to the cross daily.
"Those who are in Christ cannot sin"
"If we say that we have no sin, we deceive ourselves."
Same book, same author, two seemingly different messages. But there is no inconsistency here, and no contradiction.