The Salt Lake Temple All-Searching Eye Motif
There is a carving on the Salt Lake Temple of an eye behind a curtain. It's located on both the East and West center tower, just above the second window. The eye is encircled within a depiction of beams of light.
Many people call this symbol the all-seeing eye, but it is properly called the All-Searching Eye of the Great Jehovah. This symbol represents God's power to see all things at all times. The all-searching eye is a reference to Proverbs 15:3, where it reads that the eyes of the Lord are in every place, beholding good and evil. It is also a reference to the dedicatory prayer of the Temple of Solomon, where it was asked of The Lord that "Thine eyes may be open toward this house night and day..."(1 Kings 8:29)
The curtain above the eye is a veil, which is a metaphor of the separation between us and God. The eye just visible below the veil acts as a reminder that God continues to watch over us through the veil, and that He will occasionally remove the veil to reveal more truth, light and knowledge to us.
The rays of light motif is a symbol of the eternal light, glory and power of God.