in the time it takes to lower and then raise one's head; describes a very short period of time

to have nothing to be ashamed of; to have a clear conscience toward heaven and other people. Derived from a passage in Mencius regarding being without shame looking up at heaven or down at men.

Describes someone whose every move is controlled or dictated by others; literally, to bow or look up as someone else commands.

(idiom) to go along with the crowd; to follow the trend without any opinions of one's own