Sign, statement or image that anticipates, sometimes only for those who reread, something that will happen later in the work.
In Othello
If it were now to die, / 'Twere now to be most happy; for I fear
Othello says that death would be "the greatest joy" and fears that no future happiness will match this one. The play fulfills the line: he will die in Act V, by his own hand, beside Desdemona, and the joy of now measures what is lost.
Act II: Cyprus, the storm and Cassio's fall, Othello
Excellent wretch! Perdition catch my soul / But I do love thee! And when I love thee not, / Chaos is come again.
Act III: The temptation and the handkerchief, Othello
Do it not with poison, strangle her in her bed
Act IV: Humiliation and the willow song, Iago
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