Albert Schweitzer traces the origin of ethical behavior to a fundamental shift in perception. Before rules, laws, or religious doctrines, there must be a felt connection—a "sense of solidarity"—with others.

When we see other people as separate from ourselves, it's easy to act in selfish or harmful ways. But when we recognize our shared humanity, our common hopes and sufferings, the well-being of others becomes intertwined with our own. This empathy is the seed from which all compassion and morality grow. It is the foundation that makes ethical codes meaningful and sustainable.

This quote challenges us to cultivate this sense of connection. It suggests that the highest form of ethics is not about following external rules, but about nurturing an internal recognition of our fundamental unity.