Only Christ can change anyone and only if they wish to be changed by Him.
If we speak the truth but do not obey God ourselves then we are what God calls "a hypocrite."
Our words are more believable when our life lives what we speak.
Matthew 7:1-2 "2 For in the same way you judge others, you will be judged, and with the measure you use, it will be measured to you."
If we accuse someone of being unkind for simply telling us the truth then we are probably talking about ourselves.
The devil is the accuser of the brethren. He is so prideful and dense he refuses to admit that a born again believer cannot be accused of anything, they are sealed with the Holy Spirit of Promise as a guarantee of their inheritance. Jesus Christ has covered their sin in His own blood, they are righteous because of Him.
Ephesians 1:13-14 "13 In Him, you also, after listening to the message of truth, the gospel of your salvation—having also believed, you were sealed in Him with the Holy Spirit of promise, 14 who is given as a pledge of our inheritance, with a view to the redemption of God’s own possession, to the praise of His glory."
1 Corinthians 1:30 "30 But by His doing you are in Christ Jesus, who became to us wisdom from God, and righteousness and sanctification, and redemption,"
