Winter is the season when the whole world seems to go to sleep. The weather is cold, the ground is hard, and the trees and plants seem to be dead. Since there is little else to do, it is a time that is conducive to working hard. There isn't much else to do, and the weather else seems to suggest that we must buckle down and do the things that we have been avoiding. This is not a bad thing. It can very satisfying to work hard and be creative. Creativity is part of our makeup. Without a purpose in our lives, depression would quickly set in.
Source: Winter Poems - Poems about Winter