Systematic Theology: An Introduction to Biblical Doctrine

by Wayne Grudem

the Bible tells us that Jesus knew people’s thoughts (Matt. 9:4; 12:25; Mark 2:8; Luke 6:8; 11:17) and that God knows people’s thoughts (Gen. 6:5; Ps. 139:2, 4, 23; Isa. 66:18), but there is no indication that angels or demons can know our thoughts.