These verses are for the believers who have faith and follow CHrist.
Matthew5
[19] Whosoever therefore shall break one of these least commandments, and shall teach men so, he shall be called the least in the kingdom of heaven: but whosoever shall do and teach them, the same shall be called great in the kingdom of heaven.
[20] For I say unto you, That except your righteousness shall exceed the righteousness of the scribes and Pharisees, ye shall in no case enter into the kingdom of heaven.
When a righteous man turneth away from his righteousness, and committeth iniquity, and dieth in them; for his iniquity that he hath done shall he die." (Ezekiel 18:24-26.)
This passage clearly shows that the "righteous" man (the just man, the man in the state of grace) can "fall away" from that righteousness and "die" in his "sin." In Scriptural language, to "die in one's sins" is to be a reprobate, damned.
"But I keep under my body, and bring it into subjection: lest that by any means, when I have preached to others, I myself should be a castaway" (I Cor. 9:27). Are we any better than the Apostle?
Zeke