How to grab luck by the tail and not lose touch with reality

The question is relevant. First, let's define the terminology. It is better to see once than to hear a hundred times. For example, you want to create an online store and are looking for a platform for it. Luck is when you find exopencart.ru. Okay, luckily we figured it out. What's with reality? It's a little more complicated here, refresh your knowledge in the general theory of relativity, quantum mechanics, and then come and discuss this burning issue.