Empathy is the ability to feel another's emotions (as opposed to reading specific thoughts). It is the Donas of the Ridenow Domain.
The level and form of empathy can vary, from sensing a non-telepaths feelings, a telepaths feelings, the feelings of an animal or the feelings of a non-humanoid. While empathy can be common it is usually manifested in small measure and not possessed by every telepath.
Those with empathy usually make excellent Monitors once trained.