In post #302, you inferred that perfect obedience isn't possible.
But in post #315 you laid out how it can be possible.
Which is true?
Both.
Sinless "perfection" means the condition, state, or quality of being free or as free as possible from all flaws or defects. The action or "process" of improving something until it is faultless or as faultless as possible.
1John 3:9-10 No one who is born of God will continue to sin, because God’s seed remains in him; he cannot go on sinning, because he has been born of God. This is how we know who the children of God are and who the children of the devil are: Anyone who does not do what is right is not a child of God; nor is anyone who does not love his brother.
Do we willingly continue in our sins once we are Spiritually born again from above? No, for if we do then there is no more sacrifice for sin, but a certain fearful looking for of judgment and fiery indignation, which shall devour the adversaries. Hebrews 10:26-27.
We now have an Advocate (Christ Jesus) that sits at the right hand of the Father making intercession for us when we do sin at times. 1John 2:1-2. Grace does not give us a license to sin, but yet being housed in this fleshly body that is still mortal and corruptible where the sin nature dwells we will stumble at times. We are only being made perfect until we receive perfection in Christ when our redemption draws near in the coming of the Lord. 1 Corinthians 15:51-55.
1Peter 1:15 But as he which hath called you is holy, so be ye holy in all manner of conversation;
1Peter 1:16 Because it is written, Be ye holy; for I am holy.
The word "holiness" means set apart or purposefully different. It doesn't mean "perfection". God being holy and perfect means He is completely different than the imperfect world we live in and He is perfect, meaning He upholds every aspect of righteousness all the time because He is God. It is that same perfection that is seen in the Father that we strive for everyday of our lives here on earth. We are made righteous by that of God's righteousness as our own is as a filthy rag to God.
While here on earth we do strive to be holy as we draw closer to God and learn of Him, but yet we will never achieve full perfection until this corruptible puts on incorruption, and this mortal puts on immortality. This can only happen when Christ returns and we are changed by the Holy Spirit to be then made perfect as we are caught up into the clouds to meet Jesus in the air.
God knows we will stumble and fall short at times as we are yet humans, but God is greater than the mistakes we make and is always there to pick us up, dust us off and set our feet straight again when we humble ourselves before Him. All our sins have been forgiven and we have been made clean again in our spirit by the blood of Christ as we are Spiritually born again from above and sealed by the Holy Spirit unto the day of redemption, Ephesians 4:30.
That which you struggle with in this world the battle belongs to the Lord and He will always walk with you no matter what you are going through as He will bring you out victorious over the enemy that tries to buffet us.
2 Corinthians 12:9 Most gladly therefore will I rather glory in my infirmities, that the power of Christ may rest upon me.
2 Corinthians 12:10 Therefore I take pleasure in infirmities, in reproaches, in necessities, in persecutions, in distresses for Christ's sake: for when I am weak, then am I strong.
1Cor 15:52 In a moment, in the twinkling of an eye, at the last trump: for the trumpet shall sound, and the dead shall be raised incorruptible, and we shall be changed.
1Cor 15:53 For this corruptible must put on incorruption, and this mortal must put on immortality.
1Cor 15:54 So when this corruptible shall have put on incorruption, and this mortal shall have put on immortality, then shall be brought to pass the saying that is written, Death is swallowed up in victory.