Ignoring who you authentically are can literally be killing you. Forcing yourself to be someone you are not, or stuffing down who you really are, is incredibly taxing and will shorten your life by years and years. (McGraw, Phillip C., PhD. Self Matters. p 17, 88, 127. NY: Simon & Schuster Source, 2001.)
Refer to Adapting and the Brain for additional information.