I nearly wrote, "Nature is the best teature"....
What's the difference between doğa and doğay? I've seen both translated as "nature".
You shouldn't have. Doğay is a name, but it does not mean nature :)
OK, then I probably misremembered!
(Or maybe I saw "doğayı" and interpreted it as "doğay-ı" instead of as "doğa-yı".)
That is probably it. Doğay is even an uncommon name...I have only met one person named it :)
Doğa is also a name.