William Shakespeare on Opportunity

“There is a tide in the affairs of men, Which, taken at the flood, leads on to fortune; Omitted, all the voyage of their life Is bound in shallows and in miseries.”

“Urge them while their souls Are capable of this ambition, Lest zeal, now melted by the windy breath Of soft petitions, pity and remorse, Cool and congeal again to what it was.”

“O opportunity, thy guilt is great! 'Tis thou that executest the traitor's treason; Thou set'st the wolf where he the lamb may get; Whoever plots the sin, thou 'point'st the season; 'Tis thou that spurn'st at right, at law, at reason.”