The endurance athlete is the ultimate realist.
Happy people don't run a 3:47 mile.
During long, slow distance training, you should think of yourself as a thoroughbred disguised as a plow horse. No need to give yourself away by running fast.
There's no satisfaction without a struggle first.
There are no secrets to running success,anyone who says there are is probably trying to sell you something.
You've got to be a little bored to be doing really good training.