And their feet were straight feet; and the sole of their feet was like the sole of a calf's foot: and they sparkled like the colour of burnished brass.
Straight feet - i:e., straight legs. Not protruding in any part, as the legs of an ox, but straight like a man's (Grotius). Or, like solid pillars, not bending, as man's, at the knee. They glided along rather than walked. Their movements were all sure, right, and without effort (Kitto's 'Cyclopaedia').
The sole of their feet was like the sole of a calf's foot. Hence, Henderson supposes that "straight feet" implies that they did not project horizontally like men's feet, but vertically as calves' feet. The solid firmness of the round foot of a calf seems to be the point of comparison.
Like the colour of burnished brass - literally, 'like the eye of,' etc.; i:e., like the glittering appearance of polished brass, indicating God's purity.