This above all: to thine own self be true,
And it must follow, as the night the day,
Thou canst not then be false to any man.
Authentication Score 2
Shakespeare, William. "Hamlet." Mr. William Shakespeare's Comedies, Histories, & Tragedies. London: Edward Blount and William and Isaac Jaggard, 1623, act 1, sc. 3.
Shakespeare, William. "Hamlet." The Norton Shakespeare, edited by Stephen Greenblatt, et al., 3rd ed., W. W. Norton & Company, 2015, act 3, sc. 4.