I think that David sums it up perfectly:
A flawless winter's day today, a dazzling blue sky, about ten degrees. A slight tailwind all the way. A cheery greeting from everyone I passed. All the muscles working in concert, an effortless gentle spin all the way to work.
Apart from that rather foreign idea of "muscles working in concert" (an incredibly rare event for me!) my own trundle to the salt mine was much like this today. And the non-cyclists with whom I toil – poor, uninitiated souls that they are – stare at me in disbelief when I bounce in babbling about what a beautiful day it is. They just slump there, still shivering with cold from their trip to work.
But not I. I'm warmed from the inside. And regardless of the outside temperature, when the sun is shining and the wind is nothing more than the faintest puff – then it is indeed a beautiful day and I'd far rather be sitting on my bike than stuck in a car or tram or train.
Or here at work for that matter. Dammit.