Thus conscience does make cowards of us all, / And thus the native hue of resolution / Is sicklied o’er with the pale cast of thought, / And enterprises of great pith and moment, / With this regard their currents turn awry / And lose the name of action.
Act III, Scene 1 · Hamlet
Context
Hamlet concludes his soliloquy by declaring that overthinking turns everyone into cowards, draining the energy needed for decisive action and causing important plans to fail before they start.
Analysis
The metaphor 'sicklied o'er' makes thought into a disease that infects healthy resolution, and the color imagery—'native hue' drained to 'pale cast'—gives thinking a physical, bodily cost. 'Lose the name of action' is especially precise: plans do not just fail, they stop qualifying as action at all, as if overthinking strips them of their essential nature. The anaphora 'Thus... And thus' makes this sound like logical conclusion, but it is really self-diagnosis—Hamlet is describing his own condition.
Essay Tip
Use this to argue that Hamlet recognizes his fatal flaw while caught in it—this is a moment of clear self-awareness (he knows thinking prevents action) that nonetheless does not lead to change, illustrating the play's tragic insight that understanding yourself does not mean you can act differently.