A few foundation principles:

Foundation Principle #1: 

Our conscious mind cannot focus on two different things at the exact same time.

Foundation Principle #2: 

What we focus on, think about, generates our feelings. When we focus on some things, we experience emotions like anxiety, fear, despair, anger. When we focus on other things we feel trusting, loved, hopeful, and cooperative.

Foundation Principle #3: 

We have the power to choose what we focus on, what we think about. 

Foundation Principle #4: 

Since we have the power to choose the direction of our thoughts, we can change, in an instant, what emotion we're feeling.

Foundation Principle #5:

It's simple, but not easy. It takes practice, but it's worth the effort.

It's an inside job!