■Self-love (or love for oneself) is nothing more than the emotion engraved in our hearts. This emotion inspires people's various hobbies and desires and can be transformed into bad habits in everyone. It can be transformed into virtue; self-love, in its different transformations, can produce pride as well as humility. [USA] Fromm: "Selfishness, Self-Love and Self-Interest"

■ As long as a person is alive, the only passion that will never disappear is self-love. [France] Rousseau: "Emile"

■Self-love is a tool we must treasure. It seems to be an eternal standby needed by human beings; - it is very necessary, very precious, it brings us joy. Therefore, we must treasure it. [France] Voltaire: "Philosophical Dictionary·Self-Love"

■Man can feel physical pleasure and pain, so he avoids the former and seeks the latter. It’s this constant escape and search that I call self-love. [France] Helvetius: "On Man's Intellectual Capacity and Education"