We wait. We are bored. (He throws up his hand.) No, don't protest, we are bored to death, there's no denying it. Good. A diversion comes along and wh… - Samuel Beckett

Hamm: And the horizon? Nothing on the horizon?
Clov: (Lowering the telescope, turning towards Hamm, exasperated): What in God's name would there be on the horizon? (Pause.)
Hamm: The waves, how are the waves?
Clov: The waves? (He turns the telescope on the waves.) Lead.
Hamm: And the sun?
Clove: (Looking) Zero.
Hamm: But it should be sinking. Look again.
Clov: (Looking) Damn the sun.
Hamm: Is it night already then?
Clov: (Looking) No.
Hamm: Then what is it?
Clov: (Looking) Gray. (Lowering the telescope, turning towards Hamm, louder.) Gray! (Pause, still louder.) GRRAY!

Clov: Why this farce, day after day?
Hamm: Routine. One never knows. [Pause.] Last night I saw inside my breast. There was a big sore.
Clov: Pah! You saw your heart.
Hamm: No, it was living. [Pause. Anguished.] Clov!
Clov: Yes.
Hamm: What's happening?
Clov: Something is taking its course. [Pause.]
Hamm: Clov!
Clov: [impatiently] What is it?
Hamm: We're not beginning to ... to ... mean something?
Clov: Mean something! You and I, mean something! [Brief laugh.] Ah that's a good one!
Hamm: I wonder. [Pause.]

What I assert, deny, question, in the present, I still can. But mostly I shall use the various tenses of the past. For mostly I do not know, it is perhaps no longer so, it is too soon to know, I simply do not know, perhaps shall never know.