The Tempest, Act IV, Scene I [You do look, my son]

Prospero speaks to Ferdinand and Miranda You do look, my son, in a moved sort, As if you were dismay'd: be cheerful, sir. Our revels now are ended. These our actors, As I foretold you, were all spirits and Are melted into air, into thin air: And, like the baseless fabric of this vision, The cloud-capp'd towers, the gorgeous palaces, The solemn temples, the great globe itself, Ye all which it inherit, shall dissolve And, like this insubstantial pageant faded, Leave not a rack behind. We are such stuff As dreams are made on, and our little life Is rounded with a sleep. Sir, I am vex'd; Bear with my weakness; my, brain is troubled: Be not disturb'd with my infirmity: If you be pleased, retire into my cell And there repose: a turn or two I'll walk, To still my beating mind.