1. Accepting the idea that external events and other people are not responsible for directly causing your emotional upset. Accept responsibility for largely contributing to your emotional upset by holding a rigid and demanding philosophy that you, others and life itself be a particular way. This is the principal of emotional responsibility. It is at the core of Rational Emotive Behavior Therapy philosophy.
2. Accepting that human worth cannot be validly measured. Then elect to rate the parts of a person or their behavior but elect to not sum these parts and attempt to score the person as a person. See that people who do bad things are fallible humans who are doing bad things but are not bad people. Those people who are misbehaving are responsible for their bad actions but damning them is philosophically illegitimate and leads to self-defeating anger and rage. When you think this way about yourself you can develop unconditional self-acceptance and when you think this way about others you can develop unconditional other-acceptance. The concepts of human fallibility and unconditional human worth are at the core of Rational Emotive Behavior Therapy Philosophy.
3. Accepting that the worst-case scenario may happen (death of a loved one, personal loss, big mistakes) and that although these are very, very bad that life goes on and that one can still have some degree of happiness despite the occurrence of the worst-case scenario. This is the concept of unconditional life-acceptance.
4. Accepting that we live in a world of probability where absolute certainty does not exist. This is part of the philosophy of unconditional life acceptance. We may wish for certainty but we will be far better off, and without anxiety, if we learn to tolerate the uncertainty of life. With such tolerance for uncertainty the feeling of concern will motivate us to take steps to prevent what is preventable and to take action in the face of uncertainty.
5. Accepting that humans often disturb themselves by demanding comfort, ease, familiarity, and simplicity. People who make a profound philosophical shift learn to push themselves to give up these non-ego related disturbances and adopt a philosophy of high discomfort tolerance where comfort, ease, familiarity and simplicity are desired but not demanded.
Making a profound philosophical shift takes a tremendous amount of work and practice. However, in striving for such a profound philosophical shift you get better value for your therapeutic dollar. Getting better is fine but staying better is better still.