Take care of your immune system. If you frequently set yourself in conditions or environments of stress, toxic influence or any actions which call for your adrenalin and protective system, your cells will be occupied with protective measures instead of investing energy on growing and progress.
If you assume to be pilot over your own mind and body, you can influence the picture of your destiny and the consequences.

Video by Dr. Bruce Lipton : "I will teach you how to never get sick again"
//youtu.be/3YGKyJsH7fA