You are fooling yourself if you don't think you sin. If ones teacher is telling them they do not sin= RUN FROM THEM.
It is written...
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Be ye therefore perfect, even as you Father which is in heaven is perfect.” (Matt 5:48)
“I in them, and thou in me,
that they may be made perfect in one; and that the world may know that thou hast sent me, and hast loved them, as thou hast loved me." (John 17:22-23)
“Knowing this, that our old man is crucified with him, that the body of sin might be destroyed, that henceforth we should not serve sin.
For he that is dead is freed from sin.” (Rom. 6:6-7)
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Being then made free from sin, ye became the servants of righteousness." (Rom 6:18)
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But now being made free from sin, and become servants to God, ye have your fruit unto holiness, and the end everlasting life." (Rom 6:22)
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There is therefore now no condemnation to them which are in Christ Jesus, who walk not after the flesh, but after the Spirit." (Rom 8:1)
"Awake to righteousness, and
sin not; for some have not the knowledge of God: I speak this to your shame." (1 Cor 15:34)
"For he hath made him to be sin for us, who knew no sin;
that we might be made the righteousness of God in him." (2 Cor 5:21)
"Finally, brethren, farewell.
Be perfect, be of good comfort, be of one mind, live in peace; and the God of love and peace shall be with you." (2 Cor 13:11)
"And you hath he quickened, who were dead in trespasses and sins;
Wherein
in time past ye walked according to the course of this world, according to the prince of the power of the air, the spirit that now worketh in the children of disobedience:
Among whom also we all had our conversation in times past in the lusts of our flesh, fulfilling the desires of the flesh and of the mind; and were by nature the children of wrath, even as others." (Eph 2:1-3)
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Let us therefore, as many as be perfect, be thus minded: and if in anything ye be otherwise minded, God shall reveal even this unto you." (Phil 3:15)
"Whom we preach, warning every man, and teaching every man in all wisdom;
that we may present every man perfect in Christ Jesus:" (Col 1:28)
"Nevertheless the foundation of God standeth sure, having this seal, The Lord knoweth them that are his. And,
let every one that nameth the name of Christ depart from iniquity." (2 Tim 2:19)
"All scripture is given by inspiration of God, and is profitable for doctrine, for reproof, for correction, for instruction in righteousness:
That the man of God may be perfect, thoroughly furnished unto all good works." (2 Tim 3:16-17)
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But we are not of them who draw back unto perdition; but of them that believe to the saving of the soul." (Heb 10:39)
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Unto the pure all things are pure: but unto them that are defiled and unbelieving is nothing pure; but even their mind and conscience is defiled.
They profess that they know God;
but in works they deny him, being abominable, and disobedient, and unto every good work reprobate." (Titus 1:15-16)
"But let patience have her perfect work,
that ye may be perfect and entire, wanting nothing." (James 1:4)
"If any man offend not in word,
the same is a perfect man, and able also to bridle the whole body." (James 3:2)
"But as he which hath called you is holy, so
be ye holy in all manner of conversation;
Because it is written, Be ye holy; for I am holy." (1 Peter 1:15-16)
"Forasmuch then as Christ hath suffered for us in the flesh, arm yourselves likewise with the same mind:
for he that hath suffered in the flesh hath ceased from sin;" (1 Peter 4:1)
"According as his divine power hath given unto us all things that pertain unto life and godliness, through the knowledge of him that hath called us to glory and virtue:
Whereby are given unto us exceeding great and precious promises:
that by these ye might be partakers of the divine nature, having escaped the corruption that is in the world through lust." (2 Peter 1:3-4)
“Wherefore the rather, brethren, give diligence to make your calling and election sure: for
if ye do these things, ye shall never fall:" (2 Peter 1:10)
"Wherefore, beloved, seeing that ye look for such things, be diligent that ye may be found of him in peace,
without spot, and blameless." (2 Peter 3:14)
“But if we walk in the light, as he is in the light, we have fellowship one with another,
and the blood of Jesus Christ his Son cleanseth us from all sin.” (1 John 1:7)
“Whosoever committeth sin transgresseth also the law: for sin is the transgression of the law.
And ye know that he was manifested to take away our sins; and
in him is no sin.
Whosoever abideth in him sinneth not: whosoever sinneth hath not seen him, neither known him.
Little children, let no man deceive you: he that doeth righteousness is righteous, even as he is righteous.
He that committeth sin is of the devil; for the devil sinneth from the beginning. For this purpose the Son of God was manifested, that he might destroy the works of the devil.
Whosoever is born of God doth not commit sin; for his seed remaineth in him: and he cannot sin, because he is born of God.” (1 John 3:4-9)
“We know that
whosoever is born of God sinneth not; but he that is begotten of God keepeth himself, and that wicked one toucheth him not.” (1 John 5:18)
Looks like you are warning folks to run from Jesus, Paul, Peter, John, and James.