Do you know what happen when you have continuous bad sneezing and corresponding sore throat and painful back part of nose? Brain freeze. You can't think right. You don't even want to think. Only thing in your mind is to get the irritation away.
"mens sana in corpore sano"
-from the Roman poet Juvenal
Meaning "A healthy mind in a healthy body." Just like he says, everything begins from a healthy body. Without it, you are unable of more than you expect.