In 1 John 2:9, the same 'whoever says... but... is' structure exposes false claims about love for brother, mirroring false claims of knowing God.

1 John 2:6 calls those who claim to abide in Christ to walk as He walked, specifying the obedience required from the false claimant.

1 John 2:5 promises that keeping His word perfects love, contrasting the liar's lack of truth with the one who truly knows God.

1 John 2:3 states the positive test: keeping commandments shows we know Him — the direct opposite of the liar in this verse.

In 1 John 4:20, claiming to love God while hating a brother is a liar — same pattern as claiming to know God without keeping commandments.

In 1 John 1:10, calling God a liar for denying sin parallels being called a liar for claiming knowledge without obedience.

In 1 John 1:8, the phrase 'truth is not in us' echoes the same phrase here, though about denying sin rather than disobeying commandments.

In 1 John 1:6, claiming fellowship while walking in darkness parallels claiming to know God while disobeying — both are lies.

In 1 John 4:8, the test shifts to love—not keeping commands shows lack of truth; not loving shows lack of knowing God.

In 1 John 3:6, the same test applies: true knowledge of God results in not persisting in sin, reinforcing that keeping commandments is evidence of knowing Him.

In James 2:14-16, faith without works is dead — parallels claiming to know God without obedience, both stress that deeds prove claims.

In Titus 1:16, they profess to know God but deny him by works — an almost identical warning against claiming knowledge without obedience.

In Hosea 8:2, Israel cries 'My God, we know you' while rejecting good — directly parallels claiming to know God but disobeying.

Psalm 119:166 shows someone who hopes in salvation and does God's commandments — the opposite of the false claim in 1 John 2:4.

In 1 Corinthians 7:19, keeping God's commandments is what matters, reinforcing the same priority of obedience over mere claim.

In John 8:55, Jesus applies the same test: claiming to know God without keeping His word makes one a liar, mirroring the false claim here.

Luke 6:49 describes a hearer who does not do — like the liar who claims to know but does not obey; both end in ruin.

Jeremiah 22:16 defines knowing God as doing justice — directly contradicting the liar's claim to know God without obedience.

Galatians 4:9 warns that even those who know God can turn back, showing that knowledge must be paired with continued obedience.

Hosea 5:4 says they have not known the LORD because they cannot turn to Him — supporting the link between knowledge and obedience the liar denies.

Daniel 11:32 says those who know God do exploits — contrasting the liar's lack of deeds in 1 John 2:4.

Proverbs 19:16 says keeping the commandment saves the soul — echoing the serious consequence of the liar's disobedience.