“But I, the LORD, search all hearts and examine secret motives. I give all people their due rewards, according to what their actions deserve.””
God is the only one who can search our hearts. He alone knows all that goes on in the world and why. He sees the external things and the internal motivations. That is why He is the one who can judge and reward according to what we deserve.
Create in me a pure heart O Lord. One that follows You and does things out of pure motives. I pray I can bring glory to You in the external world and also the internal world of my soul. Amen.