Yes, everything we have today begins with thought and came out of someone's "imagination". Control your thoughts control your life.
Studies have been conducted that illustrate "positive thinking" and "negative thinking" can affect us physically. What we think and (believe) has a large impact on how we feel and what we do.
A "hopeful" person and a "hopeless" person can react to (the same challenge) dramatically different.
Learning to control our own "self-talk" is a challenge for most of us. We're bombarded with "news" and other outside sources (advertisers, family, friends, co-workers, and mates/spouses all competing for mindshare from us.
They want us to think about whatever it is (they) want us to focus on. Meditation is a form of "mental toxic cleaning". The goal is to initially empty the mind of thoughts and then gradually affirm and visualize whatever (you) want for yourself.
It's the ultimate exercise of "me time".
Being in tune with oneself does not mean one can avoid dying it may however remove the fear. Peace of mind is priceless!
"The kingdom of heaven is (within)." :)