The Shakespearean tragedy offers to the author a topic based on the theme-character Hamlet in the hesitation -investigation of Act III monologue , where Hamlet, invested by the father of the ethical task of revenge against the outrage suffered, analytically investigates the possibilities of to be or not to be.
Doubt is the procedural way that is part of the ethical acquisitions of the human spirit. Hamlet, before acting, is afflicted and wants to obtain proofs of what he guessed from the facts.
The “not to be” is adapting to the life and cruel contingency of the world, “to be” is acting, fulfilling its duty (to its mission) to the death.