And he brought me thither, and, behold, there was a man, whose appearance was like the appearance of brass, with a line of flax in his hand, and a measuring reed; and he stood in the gate.
Behold, there was a man. The Old Testament manifestations of heavenly beings as men prepared men's minds for the coming incarnation.
Whose appearance was like the appearance of brass - resplendent.
With a line of flax in his hand - used for longer measurements (Zechariah 2:1, "Behold, a man with a measuring line in his hand ").
Reed - used in measuring houses (Revelation 21:15). It marked the straightness of the walls.