Sometimes we forge our own principles and sometimes we accept others' principles, or holistic packages of principles, such as religion and legal systems. While it isn't necessarily a bad thing to use others' principles - it's difficult to come up with your own, and often much wisdom has gone into those already created - adopting pre-packaged principles without much thought exposes you to the risk of inconsistency with your true values.
Ray DalioAsk yourself whether you have earned the right to have an opinion. Opinions are easy to produce, so bad ones abound. Knowing that you don't know something is nearly as valuable as knowing it. The worst situation is thinking you know something when you don't.
Ray DalioSuccess is not in obtaining the thing. Because there's always another thing. And then you look back on it, and for me, through my evolution, yes I have success by most measures - but for me, when it comes to the greatest joy of reward, there's an emotional element and there's an intellectual element. Emotionally, my greatest joy was the personal relationships I've had. That was the greatest joy. Intellectually, my satisfaction was that I do feel I've evolved well and I'm doing my best to contribute toward evolution.
Ray Dalio