Can you help me revise this paragraph?

Loyalty is one of the most important factors in any type of relationship, be it ruler to follower or friend to friend. Loyalty is always tested, you would see who is the person that would support you throughout your decisions and who is your shadow, which is there when you are in the bright time but is gone once you step into the dark. When you think if you should be loyal to someone you believed in, think about how they are feeling. Your loyalty can even maybe safe their life. Don’t be the shadow, be the true loyal friend. THANK YOU!