The development focusses mainly on the second theme and its triplet rhythm. A huge climax at the end of the development is followed by one of the most marvellous surprises in all music. Beethoven dramatically quotes the whispered repeated note theme (short-short-short-long) of the preceding scherzo movement. This ominous quotation is like a sudden recollection of past anxiety, and it creates a connection between the last two movements.
This leads into the powerful recapitulation of the fourth movement, preparing for the renewal of the victory over uncertainty.
During the long coda of the finale, earlier themes are heard in altered and quickened versions. Several times, the music keeps going even though the listener thinks it’s coming to an end. Over and over, Beethoven affirms the tonic key and resolves the frenzied tensions built up during the symphony. Such control over tension is an essential element of Beethoven’s genius.