For just as the lightning flashes and lights up the sky from one end to the other, so will be the Son of Man in His day.
KJV
For as the lightning, that lighteneth out of the one [part] under heaven, shineth unto the other [part] under heaven; so shall also the Son of man be in his day.
ASV
for as the lightning, when it lighteneth out of the one part under the heaven, shineth unto the other part under heaven; so shall the Son of man be in his day.