Fighting Against Christ
We Christians are often ignorantly guilty of fighting against Christ.
1 John 3:8: 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.
Stott in The Epistles of John, p. 125:
If, then, the whole purpose of Christ*s first appearing was to remove sins and to undo the works of the Devil, Christians must not compromise with either sin or the devil, or they will find themselves fighting against Christ.
Clearly, when we sin, we are doing what Satan wants us to do. Perhaps we do not take sin seriously enough because God*s forgiveness is so freely available.
1 John 1:9: If we confess our sins, he is faithful and just to forgive us our sins, and to cleanse us from all unrighteousness.
Every sin is an offense against Christ and the seriousness of it should not be minimized. Eating the fruit of the wrong tree does not look to us like much of an offence. What makes sin so awful is what a Wonderful Person our sins are against.
Psalms 51:4: Against thee, thee only, have I sinned, and done this evil in thy sight: that thou mightest be justified when thou speakest, and be clear when thou judgest.