“The circumstances of the world are so variable that an irrevocable purpose or opinion is almost synonymous with a foolish one.” – William Shakespeare

“We have become irrevocably involved with, and responsible for, each other.” – Marshall McLuhan

“In retrospect, each of the steps toward this abyss seemed irrevocable, and yet they had all been so small!” – James Blish

“It seemed that he gazed down on me from the height of his divinity with the aloof though passionate attention of an artist judging his finished work; calmly rejoicing in his achievement, but recognizing at last the irrevocable flaws in his initial conception, and already lusting for fresh creation.” – Olaf Stapledon

“Dear, sweet, unforgettable childhood! Why does this irrevocable time, forever departed, seem brighter, more festive and richer than it actually was?” – Anton Chekhov

“Nor deem the irrevocable Past, As wholly wasted, wholly vain, If, rising on its wrecks, at last To something nobler we attain.” – Henry Wadsworth Longfellow