Translation of "Fleeting" in Japanese

Just for a fleeting moment --

ほんの一瞬のことでしたが―

Art is long, time is fleeting.

少年老い易く学成り難し。

The customers gave him fleeting glances, then returned to their conversations.

お客たちは、チラッとその人の方をみるが、またすぐに話を始める。