“Showing off is the fool's idea of glory.”

Source: We Are Many

Act iv., Sc. 2. In stage editions, it is "Leads the way" with various interpolations, among them—
See the conquering hero comes!
Sound the trumpet, beat the drums!—
which was first used by Handel in "Joshua," and afterwards transferred to "Judas Maccabæus." The text of both oratorios was written by Dr. Thomas Morell, a clergyman.
The Rival Queens, or the Death of Alexander the Great (1677)

Dedication (1960)
Context: Everyone knows the glory of the twain
Who gave America the aeroplane
To ride the whirlwind and the hurricane.
Some poor fool has been saying in his heart
Glory is out of date in life and art.
Our venture in revolution and outlawry
Has justified itself in freedom's story
Right down to now in glory upon glory.

The Purpose of Life, p. 53
The Purpose Driven Life: What on Earth Am I Here For? (2002)

As quoted in The Cynic's Breviary : Maxims and Anecdotes from Nicolas de Chamfort (1902) as translated by William G. Hutchison, p. 37

Sometimes attributed to Ackerman this actually originates with Nicolas Chamfort, as quoted in The Cynic's Breviary : Maxims and Anecdotes from Nicolas de Chamfort (1902) as translated by William G. Hutchison, p. 37
Misattributed

Comment on the Union of Orthodox Rabbis after expelling a rabbi because of his disbelief in God as a personal entity.
Attributed in posthumous publications, Einstein's God (1997)

Book XXVIII, line 7
Translations, Orlando Furioso of Ludovico Ariosto (1773)