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

Immortal

Immortal as the stars.
—Mathilde Blind

Immortal as air or as fire is.
—Algernon Charles Swinburne

Immortal as art and as love.
—Algernon Charles Swinburne

Immortal as the sun.
—Arthur Symons

Poetry is the first and last of all knowledge: it is immortal as the heart of man.
—William Wordsworth