The path to the peaks of knowledge and the path to the heights of compassion are one and the same. Only knowledge and understanding -not preaching- will lead to empathy. A man with a broken leg will not be helped by the compassion of a surrounding crowd, but by one who, knowing what to do, treats his leg correctly.
Mere preaching is like standing before a stove, and asking it to perform its duty of warming up the room. It is the same when you tell people they need to practise brotherly love. Just as one must put wood in the stove and light a fire, so must he give people the knowledge their souls need in order to join in brotherly love.
Source (German): Rudolf Steiner – GA 97 – Das christliche Mysterium – Vienna, 22 February 1907 (page 245)