Matthew 7:12-14
In everything do to others as you would have them do to you; for this is the law and the prophets.
13 “Enter through the narrow gate; for the gate is wide and the road is easy that leads to destruction, and there are many who take it. 14 For the gate is narrow and the road is hard that leads to life, and there are few who find it.
Wide gate, easy road to destruction: Just believe that Jesus Christ will save you, and you are guaranteed to inherit eternal life. Obedience to God's commandments is not necessary. Good works are not necessary. You are merely hearers of the word of God. Matthew 25:41-46
Narrow gate, hard road to eternal life: “
Whoever comes to me and does not hate father and mother, wife and children, brothers and sisters, yes, and even life itself, cannot be my disciple." Luke 14:26, "Then he said to them all, “If any want to become my followers, let them deny themselves and take up their cross daily and follow me." Luke 9:23 (Matthew 25:31-40, 46.) You are truly
doers of the word of God.
1 John 2:3-5
Now by this we may be sure that we know him, if we obey his commandments. 4 Whoever says, “I have come to know him,” but does not obey his commandments, is a liar, and in such a person the truth does not exist; 5 but whoever obeys his word, truly in this person the love of God has reached perfection. By this we may be sure that we are in him: 6 whoever says, “I abide in him,” ought to walk just as he walked.
We must imitate Jesus' obedience to his Father until we die if we want to inherit eternal life. Philippians 2:8,
Hebrews 5:9, Romans 2:7-8,
Matthew 7:21, Ephesians 2:10
Paul strived to enter eternal life through the narrow gate:
1 Corinthians 9:25-27
Athletes exercise self-control in all things; they do it to receive a perishable wreath, but we an imperishable one. 26 So I do not run aimlessly, nor do I box as though beating the air; 27 but I punish my body and enslave it, so that after proclaiming to others I myself should not be disqualified. Luke 13:23-27
The
good news (gospel) is that Jesus Christ came to earth to redeem mankind so that we all can have the
possibility/hope of inheriting eternal life. Before he came to earth to redeem us from Adam's sin, there was
no possibility for anyone to inherit eternal life.
Titus 3:7
James 1:22
But be doers of the word, and not merely hearers who deceive themselves.
It is not in my job description to define the requirement. Here is a hint though:
1 John 5:16-17
If you see your brother or sister committing what is not a mortal sin, you will ask, and God will give life to such a one—to those whose sin is not mortal. There is sin that is mortal; I do not say that you should pray about that. 17 All wrongdoing is sin, but there is sin that is not mortal.
Examples of mortal sins:
Galatians 5:19-21
Now the works of the flesh are obvious: fornication, impurity, licentiousness, 20 idolatry, sorcery, enmities, strife, jealousy, anger, quarrels, dissensions, factions, 21 envy, drunkenness, carousing, and things like these. I am warning you, as I warned you before: those who do such things will not inherit the kingdom of God.
Colossians 3:5-6
Put to death, therefore, whatever in you is earthly: fornication, impurity, passion, evil desire, and greed (which is idolatry). 6 On account of these the wrath of God is coming on those who are disobedient.
Ephesians 5:1-4
Therefore be imitators of God, as beloved children, 2 and live in love, as Christ loved us and gave himself up for us, a fragrant offering and sacrifice to God. 3 But fornication and impurity of any kind, or greed, must not even be mentioned among you, as is proper among saints. 4 Entirely out of place is obscene, silly, and vulgar talk; but instead, let there be thanksgiving. 5 Be sure of this, that no fornicator or impure person, or one who is greedy (that is, an idolater), has any inheritance in the kingdom of Christ and of God.
Your answer actually proves the point I've been making.
If obedience is the condition for inheriting eternal life, but you cannot define how much obedience is required, then you have no gospel at all. An undefined requirement cannot save anyone. It cannot be taught, obeyed, measured, or trusted.
Paul does not ground eternal life in an undefined level of human obedience. He grounds it in the obedience of One (Rom 5:19).
You quoted Matt 7, 1 Jn 2, Gal 5, Eph 5, etc., but none of those passages define a quantifiable obedience requirement for inheriting eternal life. They describe the fruit of those who already have life, not the condition for receiving it.
The New Testament is consistent:
Eternal life is received by believing the gospel (Jn 3:14-18, 1 Cor 15:1–4).
The Spirit is received by faith, not works (Gal 3:2).
We are sealed until the day of redemption (Eph 1:13-14, 4:30).
Christ perfected forever those He sanctifies (Heb 10:14).
He saves to the uttermost because He always lives to intercede (Heb 7:25).
No one can snatch His sheep from His hand (Jn 10:28–29).
If salvation / eternal life depends on our obedience, then none of these promises mean anything.
So I’ll restate the question, because it is the hinge of the entire discussion: If obedience is the condition for inheriting eternal life, how much obedience is required & where does Scripture define that requirement?
If the requirement cannot be defined, then salvation becomes unknowable & the good news becomes no news at all.
I'm staying with Paul’s gospel: eternal life rests on the obedience of Christ & faith placed in His Lordship, sin atoning death & resurrection, not the fluctuating obedience of the many.