True and we have to ask ourselves: which is the rational way? We are all separate individuals. At the same time we are a part of the whole. Rational choices are those that work in harmony with the whole. It's as simple as that. Being selfless is not rational, because then I disregard myself. Such disregard will cause friction between myself and the world. Nor is being selfish rational unless the selfishness encompasses the whole. Because that will also lead to friction. The rational approach is to care for both myself and others. Without such care there will be friction, like an engine not functioning well.

Then how to make such rational choices? Use both your mind and your heart.