If our hearts condemn us, we know that God is greater than our hearts, and he knows everything.
NIV
Whenever our hearts in [tormenting] self-accusation make us feel guilty and condemn us. [For we are in God's hands.] For He is above and greater than our consciences (our hearts), and He knows (perceives and understands) everything [nothing is hidden from Him].
AMP
For if our heart condemn us, God is greater than our heart, and knoweth all things.
KJV
Do not be like Cain, who belonged to the evil one and murdered his brother. And why did he murder him? Because his own actions were evil and his brother's were righteous.
NIV
[And] not be like Cain who [took his nature and got his motivation] from the evil one and slew his brother. And why did he slay him? Because his deeds (activities, works) were wicked and malicious and his brother's were righteous (virtuous).
AMP
Not as Cain, who was of that wicked one, and slew his brother. And wherefore slew he him? Because his own works were evil, and his brother's righteous.
KJV
We accept human testimony, but God's testimony is greater because it is the testimony of God, which he has given about his Son.
NIV
If we accept [as we do] the testimony of men [if we are willing to take human authority], the testimony of God is greater (of stronger authority), for this is the testimony of God, even the witness which He has borne regarding His Son.
AMP
If we receive the witness of men, the witness of God is greater: for this is the witness of God which he hath testified of his Son.
KJV
If anyone acknowledges that Jesus is the Son of God, God lives in them and they in God.
NIV
Anyone who confesses (acknowledges, owns) that Jesus is the Son of God, God abides (lives, makes His home) in him and he [abides, lives, makes his home] in God.
AMP
Whosoever shall confess that Jesus is the Son of God, God dwelleth in him, and he in God.
KJV
Dear friends, I am not writing you a new command but an old one, which you have had since the beginning. This old command is the message you have heard.
NIV
Beloved, I am writing you no new commandment, but an old commandment which you have had from the beginning; the old commandment is the message which you have heard [the doctrine of salvation through Christ].
AMP
Brethren, I write no new commandment unto you, but an old commandment which ye had from the beginning. The old commandment is the word which ye have heard from the beginning.
KJV
This is how we know that we love the children of God: by loving God and carrying out his commands.
NIV
By this we come to know (recognize and understand) that we love the children of God: when we love God and obey His commands (orders, charges)--[when we keep His ordinances and are mindful of His precepts and His teaching].
AMP
By this we know that we love the children of God, when we love God, and keep his commandments.
KJV
No one who lives in him keeps on sinning. No one who continues to sin has either seen him or known him.
NIV
No one who abides in Him [who lives and remains in communion with and in obedience to Him--deliberately, knowingly, and habitually] commits (practices) sin. No one who [habitually] sins has either seen or known Him [recognized, perceived, or understood Him, or has had an experiential acquaintance with Him].
AMP
Whosoever abideth in him sinneth not: whosoever sinneth hath not seen him, neither known him.
KJV
If we claim we have not sinned, we make him out to be a liar and his word is not in us.
NIV
If we say (claim) we have not sinned, we contradict His Word and make Him out to be false and a liar, and His Word is not in us [the divine message of the Gospel is not in our hearts].
AMP
If we say that we have not sinned, we make him a liar, and his word is not in us.
KJV
