God searches your heart and tests your mind
“I the Lord search the heart and test the mind, to give every man according to his ways, according to the fruit of his deeds.” (Jer. 17:10 ESV)
God knows and searches all hearts
“And he who searches hearts knows what is the mind of the Spirit, because the Spirit intercedes for the saints according to the will of God.” (Rom. 8:27 ESV)
The heart is deceitful above all things
“The heart is deceitful above all things, and desperately sick; who can understand it? (Jer. 17:9 ESV)
“…the Lord searches all hearts and understands every plan and thought. If you seek him, he will be found by you, but if you forsake him, he will cast you off forever.” (1 Chron. 28:9 ESV)
Above all guard your heart!
”Above all else, guard your heart, for everything you do flows from it.” (Prov 4:23 NIV)
Use God’s living Word to search your thoughts and intentions
“For the word of God is living and active, sharper than any two-edged sword, piercing to the division of soul and of spirit, of joints and of marrow, and discerning the thoughts and intentions of the heart.” (Heb. 4:12 ESV)
He helps you in your weakness
“Likewise the Spirit helps us in our weakness. For we do not know what to pray for as we ought, but the Spirit himself intercedes for us with groanings too deep for words.” (Rom. 8:26 ESV)
Therefore…
“Search me, O God, and know my heart! Try me and know my thoughts! And see if there be any grievous way in me, and lead me in the way everlasting!” (Psalm 139:23-24 ESV)
“Keep falsehood and lies far from me; give me neither poverty nor riches, but give me only my daily bread.” (Prov. 30:8 ESV)