Answer:
True.
Step-by-step explanation:
John strongly criticizes people who know Christ, his commandments and wills, but prefer to disobey him.
John recognizes that following Christ's wishes and obeying him can be difficult and sacrificial. This is because the Christian must reject his own desire and wills, but only truly knows Christ, those who obey him.
Those who do not obey him, but act as if they were models of a Christian and call themselves followers of Christ, are lying and the truth does not dwell in them.