What a Christian cannot commit are willful sins against the law.
Here I would agree with your intent, but disagree with your wording.
The word "Christian", was a LABEL given BY men, (who did NOT follow Jesus), TO men, (who DID follow Jesus).
Jesus never used the word "Christian".
Jesus used the word "CONVERTED".
Matt. 18:3.
Anyone can FOLLOW Jesus Christ's Teachings and Believe...and FALL AWAY from Following and Believing.............
EXCEPT a CONVERTED man (who CAN NOT FALL AWAY).
Continuously men who are hearing, following, believing; are WARNED..."they CAN FALL AWAY"....LOSE OUT on receiving their Salvation that Jesus OFFERED TO THEM...."IF" they do NOT continue hearing, following, believing........AND BECOME CONVERTED.
JUDAS is our prime EXAMPLE, of a man to WHO: followed, believed, THEN REJECTED the Lord..........BECAUSE he NEVER BECAME "CONVERTED".
The "UNCONVERTED": are STILL under "the LIMITS" of their own power, and are EASILY TEMPTED....whereas the CONVERTED are under "THE SUPREME POWER" of God, WHO KEEPS "His own unto Himself".
So while you say Christian, I would disagree and say CONVERTED.
Because there are "MANY" who identify "themselves" (and others identify THEM) as Christians.....YET...THEY are "NOT" all CONVERTED.
If they "WERE"...you would NeVer See, a person attending a "Christian Church" for days, months, years....LEARNING ABOUT thee Lord God....and THEN one day publically (before the congregation) ACCEPTING thee Lord God....commonly called an invitation to an Alter Call.
One moment such a person is (in today's age) called a Christian...and the next moment the same person is called a Christian...
Yet in Scripture, at the moment a person Heartfully Accepts and Declares Belief IN God and IN Jesus the Christ....that person IS EXPRESSLY called "a CONVERTED" person.
Glory to God,
Taken