Well-being cannot exist just in your own head. Well-being is a combination of feeling good as well as actually having meaning, good relationships and accomplishment.
幸福不能只存在于你自己的头脑中。幸福是感觉良好与实际拥有意义、良好关系和成就的结合。
You have to be willing to adapt, or you'll be left behind.
Every thought serves some biological purpose.