 Am I thinking about being a Christian? Am I thinking about what would God think about this? Am I thinking about certain things? Because if I'm not thinking about it, it's a man thinking in his heart. Because whatever I'm thinking in my heart, that's what I'm going to execute. In Acts 1, 24 and 25, it says God knows the hearts of all men. That's why he knew what was in the heart of Judas. And he knew who was going to replace Judas. He knew Judas.