John 1:47
[As] Jesus saw Nathaniel coming toward Him, He said [this] about him, "Look, [there is] a true Israelite, a completely honest man!"
Acts 24:16
So, for this reason I make every effort to have a clear conscience before God and men at all times.
2 Corinthians 1:12
For this is what we boast of: Our conscience testifies that we have conducted ourselves in the world, and especially toward you, in holiness and godly sincerity, not with human wisdom, but with the favor of God.
1 Thessalonians 2:10
You can testify, [just] as God can, how holy, righteous and blameless our conduct was toward you believers.
Hebrews 4:12
For God's word is alive and active and sharper than any double-edged sword. It penetrates [deep enough] even to divide [a person's] soul [from his] spirit, and his joints [from his] bone marrow [Note: This is figurative language describing the penetrating effect of God's word into a person's spiritual, inner being] and is able to judge the thoughts and intentions of a person's heart.
Revelation 2:23
And I will strike her children dead [or, "kill her children by some terrible calamity" See Ex. 5:3 LXX]. Then all the churches will know that I am the One who searches the inmost being of people [Note: The Greek says, "searches the kidneys and hearts." In that day these internal organs stood for the inner thoughts, emotions, etc.]. And I will repay each one of you people according to what you have done.