In winter I get up at night
And dress by yellow candle-light.
In summer quite the other way
I have to go to bed by day.

-Robert Louis Stevenson

What good is the warmth of summer, without the cold of winter to give it sweetness.

-John Steinbeck

The coldest winter I ever spent was a summer in San Francisco.

-Author unknown, commonly misattributed to Mark Twain