When you run after your thoughts, you are like a dog chasing a stick; every time a stick is thrown, you run after it. But if instead, you look at where your thoughts are coming from, you will see that each thought arises and dissolves within the space of that awareness, without engendering other thoughts. Be like a lion, who rather than chasing after the stick, turns to face the thrower. One only throws a stick at a lion once.

-- Dilgo Khyentse Rinpoche