When you pay attention to something in your garden (a seed), it grows just as when you don't pay attention to that seed, it won't grow. In your brain, when we focus on the negative, it kind of makes weeds grow. You know how weeds are... they take over! Well, if you are constantly paying attention to those weeds (those negative thoughts), they overtake the space in your brain (your garden). Then what happens is that there is no room for the flowers to grow or those positive thoughts. What kind of garden do you want to have?