Walt Whitman, from "As Toilsome I Wander'd Virginia's Woods" (1866):



Long, long I muse, then on my way go wandering,
Many a changeful season to follow, and many a scene of life,
Yet at times through changeful season and scene, abrupt, alone,
                                        or in the crowded street,               
Comes before me the unknown soldier's grave, comes the inscription
                                        rude in Virginia's woods,
"Bold, cautious, true, and my loving comrade."