Thoughts usually follow one upon another without intermission. In the same way, we usually chase after our thoughts like a dog that fetches the same stone thrown time after time. One thought gives birth to two, and two to three, and soon they multiply and completely invade our mind. But, lions unlike dogs don't play fetch. Instead of watching the stone, a lion would turn back and look for the one who threw it. By following the lion’s example, we can look at the source of the thoughts rather than following the thoughts themselves, and see that thoughts arise from the absolute nature of mind. In this process, thoughts naturally dissolve into that absolute nature and do not proliferate.

-- Shechen Rabjam Rinpoche