Read it through once

If we say that we have no sin, we deceive ourselves, and there's no truth in us. Why, then, belike we must sin, and so consequently die: Ay, we must die an everlasting death. What doctrine call you this, Che sera, sera,[19] What will be, shall be? Divinity, adieu! These metaphysics of magicians, And necromantic books are heavenly; Lines, circles, scenes,[20] letters, and characters; Ay, these are those that Faustus most desires. O, what a world of profit and delight, Of power, of honour, of omnipotence, Is promis'd to the studious artizan! All things that move between the quiet poles Shall be at my command: emperors and kings Are but obeyed in their several provinces, Nor can they raise the wind, or rend the clouds; But his dominion that exceeds in this, Stretcheth as far as doth the mind of man; A sound magician is a mighty god: Here, Faustus, tire[21] thy brains to gain a deity.