People choose to believe what they desire and all desire eventually leads to disappointment and dissatisfaction. So, no, even if you could choose to convince yo

People choose to believe what they desire and all desire eventually leads to disappointment and dissatisfaction. So, no, even if you could choose to convince yourself of whatever you want you're still not going to be happy. Also, people tend to pick the worst case scenario as a defense mechanism in most cases. If you really want to be happy you need to let go of your preferences; your desires and aversions.