I was on the phone with a client when she mentioned that she uses a personal constitution to guide her life.  She wrote the document 25 years ago, and it has never seen an amendment.  I should probably state that she is not very happy either. By definition, a constitution never changes.  That's a good thing. Your most important beliefs and core values should never be so flexible that you bend to the will of other ideas without any thought.  However, as you grow wise over the years, you should always be willing to consider thoughtfully amending and updating how you feel about the world. You will alter your core values with your daily life experience whether you like it or not.  Taking control of the process will lead to a more harmonious life experience.\ The next time you feel like an old dog that is reluctant to learn a new trick, consider what thoughts are guiding you and whether they are still useful in your life.