In his famous book, The Strangest Secret, Earl Nightingale
stated, you are what you think. You become what you think about
most of the time. He believed that if a person only feeds his mind
with negative thoughts, he will experience life through a dark lens.
Small things that shouldn’t affect him will ultimately become
bigger than they really are because their mind is focused on the
worst possible outcome rather than the best. He talked about how
a person who lives with mostly negative thoughts will focus his
mind on all his problems rather than the opportunities before him.
 
Fortunately, our minds are incredibly powerful and are capable of
incredibly awesome things. Our job is to stand guard at the doors
of our thoughts and feed it empowering words. This is where
positive affirmations come into play.
 
Understanding Affirmations and How They Work

Affirmations are suggestions and thoughts that you give to
yourself and can be either positive or negative. As you give
yourself these suggestions, you are feeding them into your
subconscious mind, which is what ultimately helps to determine
your mental attitude.
 
If you feed positive thoughts and suggestions into your
subconscious mind, this will ultimately build a positive or
optimistic mental attitude, and when you constantly feed your
subconscious with good, and happy ideas, your mind begins to
accept these suggestions as reality because your subconscious is
unable to differentiate between your imagination and your reality.
When you consistently inject positive ideas into your
subconscious, it will start to trust them as being the reality, and it
starts to work producing similar thought patterns.

When your thoughts become positive, you start to become more
optimistic about your life and the world around you. Your
thoughts, after all, construct you. By thinking positively, you can
empower yourself and build a healthy mindset and a healthy
frame of mind that is always thinking of growth, development, and
new ideas.