Imagine that you're standing in your kitchen holding a lemon that you've just taken from your refrigerator. 
It feels cold in your hand.
Look at the outside of it, it's yellow skin.
It's a waxy yellow, and the skin comes to small green points at the 2 ends.
Squeeze it a little and feel it's firmness and its weight.
Now raise the lemon to your nose and smell it.
Nothing smells quite like a lemon, does it?
Now cut the lemon in half and smell it.
The odor is stronger.
Now bite deeply into the lemon and let the juice swirl around in your mouth.
Nothing tastes quite like a lemon either, does it?
At this point, if you've used your imagination well, your mouth is watering. 
Let's consider the implication of this...
Words, "mere" words, affected your salivary glands.
The words did not even reflect reality, but something you imagined.
When you read those words about the lemon you were telling your brain you had a lemon, though you did not mean it.
Your brain took it seriously and said to your salivary glands, "This guy/gal is biting a lemon. Hurry, wash it away!"
The glands obeyed.
Words don't just reflect reality, they create reality, like the flow of saliva.
The brain is no subtle interpreter of our intentions.
It receives information and stores it, and it's in charge of our bodies.
Tell it something like "I'm eating a lemon," and it goes to work.
Likewise, if you tell it "Life sucks" or "Life is amazing," it goes to work.
Be careful about the words you use to trigger your brain. 
