“All I know is what the words know, and dead things, and that makes a handsome little sum, with a beginning and a middle and an end, as in the well-built phrase and the long sonata of the dead.”
— Samuel Beckett
Simplified Meaning:
The quote means that the speaker's knowledge comes from reading words and studying things from the past. This knowledge is complete and well-organized, like a sentence or a piece of music that starts, develops, and finishes perfectly.