The rule of friendship means there should be mutual sympathy between them, each supplying what the other lacks and trying to benefit the other, always using friendly and sincere words. Cicero
We were united not only by political respect for each other, but also by deep mutual sympathy as people. Helmut Kohl
At the end of his work he reserved two paragraphs only to mention the two non-coercive factors - the feeling of duty and the feeling of mutual sympathy - to which he attached little importance, as might be expected from a writer in law. Peter Kropotkin