Rudolf Steiner, January 5, 1911:
The happiness of an individual can never be purchased at the cost of the lesser happiness of others. In future, therefore, the personal moment wil be led on, led over, into something transpersonal; egoism will be led over into something that surpasses egoism, into a realm where human beins are united. Gradually no one will wish to be happy without knowing that others are equally so. This mood, in stark contrast to the pragmatism of today, is slowly emerging. There is only one means to engender this mood, and this is to gain knowledge of the true core of the human being and its nature and composition, as spiritual science teaches us. We have to know the human being if we wish to be human.
....Social practice must develop toward a fulfillment of the principle that the happiness of the individual cannot be gained at the cost of the happiness of others.
Related post: https://martyrion.blogspot.com/2021/08/at-one-ment.html
Source: The Mission of the New Spirit Revelation, pp. 13, 15