Contradiction with Matthew 6:5
Jesus warns against public displays of prayer, contrasting with 2 Timothy 1:3 where Paul mentions serving God in prayer openly and with a pure conscience.
Matthew 6:5: And when thou prayest, thou shalt not be as the hypocrites [are]: for they love to pray standing in the synagogues and in the corners of the streets, that they may be seen of men. Verily I say unto you, They have their reward.
Contradiction with Exodus 20:5
God is described as visiting the iniquity of the fathers upon the children, which contradicts the notion of serving with a pure conscience as mentioned in 2 Timothy 1:3.
Exodus 20:5: Thou shalt not bow down thyself to them, nor serve them: for I the LORD thy God [am] a jealous God, visiting the iniquity of the fathers upon the children unto the third and fourth [generation] of them that hate me;
Contradiction with Hebrews 9:14
Describes the cleansing of conscience through Christ, suggesting a need for purification that seems inconsistent with Paul's claim of an already pure conscience in 2 Timothy 1:3.
Hebrews 9:14: How much more shall the blood of Christ, who through the eternal Spirit offered himself without spot to God, purge your conscience from dead works to serve the living God? [spot: or, fault]
Contradiction with Romans 3:10
States there is none righteous, no, not one, contradicting the idea of Paul serving God with a pure conscience as stated in 2 Timothy 1:3.
Romans 3:10: As it is written, There is none righteous, no, not one:
Contradiction with Jeremiah 17:9
Describes the heart as deceitful and desperately wicked, which contradicts the notion of serving God with a pure heart as mentioned in 2 Timothy 1:3.
Jeremiah 17:9: The heart [is] deceitful above all [things], and desperately wicked: who can know it?