Each of your five senses constantly sends new information to your brain. And there’s another way your brain receives information: through subliminal messages. The unconscious mind picks up on things you don’t even realize.
Subliminal messages can be picked up by your very powerful and capable subconscious brain. Studies done show that people pick up tendencies and develop habits based on what they are exposed to.
Definition of subliminal: adj; below the threshold of conscious perception
Check out this study from UCLA University that really explains the power of subliminal messages. Study.