In this excerpt from the play The Tragical History of Doctor Faustus, the line that provides evidence that Faustus's human soul is predisposed to shun evil is the second one:
But, Mephistophilis, My blood congeals,
and I can write no more.
This line, as Marlowe uses blood as a symbol for the character of Faustus's soul, shows the reader his intention to avoid evil, but he feels he can't because it "congeals".