Frank J. Wilstach, comp. A Dictionary of Similes. 1916.

Fleeting

Light and fleeting as a dream of night lost in garish day.
—Æschylus

Fleeting as a shade.
—Anonymous

Fleeting as joy of youth.
—Edwin Arnold

Fleeting like feathers in the winde alofte.
—George Gascoigne

As fleeting as April sunshine.
—Gerhart Hauptmann

Fleeting
As bubbles that swim on the beaker’s brim
And break on the lips while meeting.
—Charles Fenno Hoffman

Fleeting as a passing sigh.
—Sigmund Krasinski

Fleeting as air.
—Jonathan Swift

Fleeting like a beam of light.
—Alfred Tennyson

Fleeting as the bow in the clouds.
—Martin Farquhar Tupper

A thing as fleeting as the thin sea-foam.
—George Sylvester Viereck

Fleeting as the wings of sleep.
—Virgil

Fleeting as health or beauty.
—William Wordsworth