That's the heart of the matter. Calvies hinder the lost from believing His Gospel. They push unbelievers away rather than drawing them to Christ.
Spiritual fruit is the correct doctrine which is applied in our lives. We will know them by their fruit.
Yes this was a central part of Paul’s doctrine
“This I say then,
Walk in the Spirit, and ye shall
not fulfil the lust of the flesh. ….Now
the works of the flesh are manifest, which are these; Adultery, fornication, uncleanness, lasciviousness, idolatry, witchcraft, hatred, variance, emulations, wrath, strife, seditions, heresies, envyings, murders, drunkenness, revellings,
and such like: of the which I tell you before, as I have also told you in time past, that they which do such things shall not inherit the kingdom of God.
But the fruit of the Spirit is love, joy, peace, longsuffering, gentleness, goodness, faith, meekness, temperance: against such there is no law.
And
they that are Christ's have crucified the flesh with the affections and lusts.
If we live in the Spirit,
let us also walk in the Spirit. Let us not be desirous of vain glory, provoking one another, envying one another.”
Galatians 5:16, 19-26 KJV
But …….it seems basic and “Of course “because it was part of Jesus Paul’s lord and saviors doctrine in the gospel
“
Every branch in me that beareth not fruit he taketh away:
and
every branch that beareth fruit, he purgeth it, that it may bring forth more fruit. Now
ye are clean through the word which I have spoken unto you. Abide in me, and I in you. As the branch cannot bear fruit of itself, except it abide in the vine; no more can ye, except ye abide in me. I am the vine, ye are the branches: He that abideth in me, and I in him, the same bringeth forth much fruit: for
without me ye can do nothing.
If a man abide not in me, he is cast forth as a branch, and is withered; and men gather them, and cast them into the fire, and they are burned.
If ye abide in me, and my words abide in you, ye shall ask what ye will, and it shall be done unto you. Herein is my Father glorified, that ye bear much fruit; so shall ye be my disciples.”
John 15:2-8 KJV
“And now I beseech thee, lady, not as though I wrote a new commandment unto thee, but that which we had from the beginning,
that we love one another. And this is love, that we walk after his commandments. This is the commandment, That, as ye have heard from the beginning, ye should walk in it.
Whosoever transgresseth, and
abideth not in the doctrine of Christ, hath not God. He that abideth in the doctrine of Christ, he hath both the Father and the Son.
If there come any unto you, and
bring not this doctrine, receive him not into your house, neither bid him God speed:”
2 John 1:5-6, 9-10 KJV
We talk often about how God is glorified it’s when believers and disciples of Jesus bear the fruits of the spirit and share Gods love outwardly towards others in deed and truth by following after Jesus the good shepherd and spreading his word
“
This is my commandment, That ye love one another, as I have loved you.”
John 15:12 KJV