“There is no man, let him be aware of it or not, who is not a combatant in this hot contest; no one who does not take an active part in the responsibility of the defeat or victory. The prisoner in his chains and the king on his throne, the poor and the rich, the healthy and the infirm, the wise and the ignorant, the captive and the free, the old man and the child, the civilized and the savage, share equally in the combat. Every word that is pronounced, is either inspired by God or by the world, and necessarily proclaims, implicitly or explicitly, but always clearly, the glory of the one or the triumph of the other. In this singular warfare we all fight through forced enlistment; here the system of substitutes or volunteers finds no place. In it is unknown the exception of sex or age; here no attention is paid to him who says, I am the son of a poor widow; nor to the mother of the paralytic, nor to the wife of the cripple. In this warfare all men born of woman are soldiers.
And don’t tell me you don’t wish to fight; for the moment you tell me that, you are already fighting; nor that you don’t know which side to join, for while you are saying that, you have already joined a side; nor that you wish to remain neutral; for while you are thinking to be so, you are so no longer; nor that you want to be indifferent; for I will laugh at you, because on pronouncing that word you have chosen your party. Don’t tire yourself in seeking a place of security against the chances of war, for you tire yourself in vain; that war is extended as far as space, and prolonged through all time. In eternity alone, the country of the just, can you find rest, because there alone there is no combat. But do not imagine, however, that the gates of eternity shall be opened for you, unless you first show the wounds you bear; those gates are only opened for those who gloriously fought here the battles of the Lord, and were, like the Lord, crucified.”

Protesilaus Frag. 656

Bion, 3.
The Lives and Opinions of Eminent Philosophers (c. 200 A.D.), Book 4: The Academy

Speech to the Third Army (1944)

Ecclesiastes 8:1-4 http://www.jw.org/en/publications/bible/nwt/books/ecclesiastes/8/, NWT

Act I (p. 54)
The Trial of God (1979)

Book 4, pt. 2, v. 12
Variant translations by Lin Yutang:
A great man is one who has not lost the child's heart.
A great man is he who has not lost the heart of a child.
The Mencius

Funeral oration for Thomas Jefferson (11 July 1826).

1810s, Letter to H. Tompkinson (AKA Samuel Kercheval) (1816)
Context: The true foundation of republican government is the equal right of every citizen, in his person and property, and in their management. Try by this, as a tally, every provision of our constitution, and see if it hangs directly on the will of the people. Reduce your legislature to a convenient number for full, but orderly discussion. Let every man who fights or pays, exercise his just and equal right in their election.

1860s, The Good Fight (1865)