Man is the only animal who does not feel at home in nature, who can feel evicted from paradise, the only animal for whom his own existence is a problem that he has to solve and from which he cannot escape. He cannot go back to the prehuman state of harmony with nature, and he does not know where he will arrive if he goes forward. Man's existential contradiction results in a state of constant disequilibrium. This disequilibrium distinguishes him from the animal, which lives, as it were, in harmony with nature.
Erich FrommThe fact that millions of people share the same vices does not make these vices virtues, the fact that they share so many errors does not make the errors to be truths, and the fact that millions of people share the same form of mental pathology does not make these people sane.
Erich FrommBasically, there can only be two answers. One is to overcome separateness and find unity by regression to the state of unity which existed before awareness ever arose, that is, before man was born. The other answer is to be fully born, to develop one's awareness, one's reason, one's capacity to love to such a point that one transcends one's own egocentric involvement, and arrives at a new harmony, at a new oneness with the world.
Erich Fromm