Where do Christians find true comfort when struggling with a decision or are disappointed or fearful about their performance? A certain phrase comes to mind that has been offered as a source of comfort: "God knows your heart." This could be taken to mean that God still loves you because you are trying your best, or that He knows you love Him and want to please Him. But is that why God loves us and accepts what we do? What does God think about our hearts?
The heart is deceitful above all things,
and desperately sick;
who can understand it.
I the Lord search the heart and test the mind, Jeremiah 17:9-10a
The fact that God knows my sinful heart strikes terror into it, so there is no comfort found by pointing myself inside. The true comfort is found in the objective, external Word of God: Jesus Christ given for the forgiveness of my sins!
Now may the Lord Jesus Christ himself, and God our Father, who loved us and gave us eternal comfort and good hope through grace, comfort your hearts and establish them in every good work and word. 2Thessalonians 2:17.