Why Ardor?

I'm asked on a daily basis "what's ardor?" or "why ardor?". 

ar·dor is a noun that means enthusiasm or passion.
synonyms: passion, fervor, zeal, vehemence, intensity, verve, fire, emotion;

No matter how much you love your job there will be days you're tired, frustrated, or just worn out. That's a given. It's also a given that you're going to encounter others that are also having a "bad" day or possibly hate what they do. Although I want to show my passion, I sometimes need a constant reminder to let my enthusiasm show in everything I do because I never know how it may positively effect someone else's work day. 

So that, is why... Ardor.