Their feet were straight feet. — Rather, each of their legs was a straight leg, i.e., without any bend in it, as at the knee, but was equally fitted for motion in any direction. So also “the sole of their feet,” the part which rested on the ground, was not, like the human foot, formed to move forward only, but was round and solid, something “like the sole of a calf’s foot.”
They sparkled. — This refers only to “the sole of the feet,” the hoof. The “burnished brass” is a different word from that used in Ezekiel 1:4, and gives another feature to the general brilliancy and magnificence of the vision.