The ego cannot distinguish between a situation and its interpretation of and reaction to that situation. You might say, "What a dreadful day," without realizing that the cold, the wind, and the rain or whatever condition you react to are not dreadful. They are as they are. What is dreadful is your reaction, your inner resistance to it, and the emotion that is created by that resistance. In Shakespeare's words, "There is nothing either good or bad, but thinking makes it so."2 What is more, suffering or negativity is often misperceived by the ego as pleasure because up to a point the ego strengthens itself through it.

Eckhart Tolle

from A New Earth: Awakening to Your Life's Purpose