In Samuel Beckett's play, Waiting for Godot, Lucky is a character that generally has little to say, as compared to most of the other character who make up for Lucky's lack of conversation. At one point, the tramps ask that Lucky be made to think: he needs his hat to do so.
Lucky's monologue, however, is one very, very long sentence. It doesn't really make any sense, and it is described logorrhoea:
The spoken form of logorrhoea...is a kind of verbosity which uses superfluous (or fancy) words to disguise an otherwise useless message as useful or intellectual.
Because it is generally just rambling, it does not have a conclusion or end. When his hat is removed, he stops "thinking." There are a few items that can be picked out as having some validity, such as the whimsical nature of God (ruling arbitrarily), without following laws or delivery sound judgment, but acting in a capricious nature. He also refers to man's inaction—seeming to present him as a victim, who worries extensively after something and then just "fades away." Lucky refers also to the "decaying state of the earth." This is, as one might expect from Pozzo, a pessimistic statement that looks to the end of the world, a hopeless standpoint.
(It is noted that this monlogue might be based on the phiolosophy of Bishop Berkeley.)
These ideas are surrounded by words that support the hopeless mood of the play: apathia (apathy), aphasia (muteness), suffers, torment, flames, endures, the end, hell, error, elimination, etc.
The purpose of Lucky in the play has been discussed and disputed for some time. However, it seems to me, in light of the foolishness he utters in his monologue, that he represents someone who need not make choices: they are made for him. He does not need to think about what he does, as he is (again) told what to do and not what to think.
Pozzo tells him what to do, he does it, and is therefore lucky because his actions are determined absolutely.