Now is the winter of our discontent
Made glorious summer by this sun of York;
And all the clouds that lour'd upon our house
In the deep bosom of the ocean buried.
I think he was trying to create the following feelings:
Awe (for the profound language)
Curiosity (how can winter be made summer)
Anticipation (acute listeners will hear the pun of "sun")
And a kind of majesty, from the cadence.