1 John 2:4
The person who says, "I have come to know Him," but does not obey what He commands, is lying [by such a profession], and the truth [about the matter] is not in his heart.
1 John 1:8
If we claim to have no sinful practices [in our lives], we are self-deceived and are not being truthful about the matter.
1 John 1:6
If we claim to share a relationship with God and yet live in darkness [i.e., in a sinful way], we are lying and are not living a truthful life.
Titus 1:16
These people claim to know God [as Savior], but they deny Him by their actions, so they are detestable and disobedient and unfit for doing anything good.
James 2:14-16
What good is it, my brothers [and sisters], if a person says he has faith but does not have [good] deeds? Can such faith save him?
1 John 1:10
If we claim that we have not committed sins, we are [in effect] calling God a liar [i.e., because He says we have] and His word [i.e., the real truth about the matter] is not in our hearts.
1 John 2:9
The person who claims to be living in [harmony with] the light [i.e., by obeying God's truth], and [yet] hates his brother is still [living] in the darkness [of sin].
1 John 4:20
If a person says, "I love God," yet [in reality] hates his brother, he is a liar. For the person who does not love his brother, whom he has seen, cannot [possibly] love God, whom he has never seen.