that is one of those scriptures that bring attention but see saying this puts a lot of people in Jeopardy of being truly saved . there are what they call addictions one example alcohol. the temptation will always be there. we have to learn through the power of the spirit to curb it. Jesus said it best the spirit is willing but the flesh is weak.. granted some use that as a excuse. my whole point is there can be failures and will be. we can struggle with the lust of the flesh. if we have failures KNOWN SIN does that mean not saved?MY KJV of the Bible says in 1 John 3:9-10 ............
"Whosoever is born of God practices not commit sin; for his seed remaineth in him: and he cannot sin, because he is born of God. In this the children of God are manifest, and the children of the devil: whosoever doeth not righteousness is not of God, neither he that loveth not his brother."
The Greek word that is translated as practice is once again a present participle, meaning that this is a habitual pattern or KNOWN SIN!. Notice that the children of the devil habitually sin but that is not true of Christians.
you skipped over my main point if the answer is no. then many church is wrong in teaching BTW this is not about discrediting the teaching of eternal salvation. many people will get hot under the collar presenting both sides.. i have read it and seen it.