Matthew 15:19
For evil thoughts, murder, extramarital affairs, sexual immorality, stealing, perjury, slander --- [all these] come from a person's heart,
Galatians 5:19-21
Now those things done by the sinful, physical nature [of a person] are evident; they are these: sexual immorality, moral impurity, indecent conduct,
Matthew 9:4
Knowing what they were thinking, Jesus said, "Why are you having such evil thoughts in your minds?
Mark 7:21-23
For from within, out of people's hearts, proceed evil thoughts, sexual immorality, stealing, murder, extramarital affairs,
Acts 8:22
So, repent [i.e., change your heart and life] of such a terrible thing and pray for the Lord to forgive you for even thinking of such a thing. Perhaps He will [if you are really sincere].
Romans 3:10-19
as it is written [Psa. 14:1ff; 53:1ff], "No one [always] does what is right; not even one person.
Romans 7:18
For I know that nothing good lives in me, that is, in my flesh, for the desire to do good is present in my heart, but the ability to carry it out [consistently] is not.
Romans 8:7-8
This is because the one whose mind is [controlled] by the flesh is an enemy of God; for he is not obedient to God's law, and in fact, cannot obey it.
Ephesians 2:1-3
And you [Gentiles] were once [spiritually] dead because of your shortcomings and sins.
Titus 3:2-6
to slander no one, to be peaceful, to be considerate [or, "gentle"] and to show every courtesy to all people.
James 1:13-15
No one should say when he is tempted, "God is tempting me," because God cannot be tempted by evil and He does not tempt anyone.