When you know the truth it can set us free from the illusion that we create in our minds. We have lots of contrast in our world. The positive side of the contrast can take the negative away. Therefore our focus is what we control and what is important. If we focus on the negative we will go down a rabbit whole that does not exist, we will get lost. If we focus on the positive then we can access so much happiness and harmony.
Fear can be dispelled by realising our spiritual power. Shed light on the darkness and there is only light.
This is difficult to do in our lives because we always tend to focus on what has went wrong even if 9 things have went right. We can train our brain on how to think. We can be conscious of our thoughts and change them.