The Hebrew noun mareh refers to appearance, sight, what is seen, or a vision. Occurring about 103 times in the OT, it describes both the visual appearance of persons and things, and the visionary mode by which God communicated with prophets (as in Ezekiel's visions).
Mareh captures the tension in Scripture between outer appearance and inner reality. God told Samuel: 'The LORD does not look at the things people look at. People look at the outward appearance, but the LORD looks at the heart' (1 Samuel 16:7). Yet mareh also describes the overwhelming visions given to Daniel and Ezekiel — God's glory disclosed in visionary form. The eschatological hope is to see God's mareh directly, face to face (1 Corinthians 13:12).