Compassion (Tib. nyingjé; snying rje and also tukjé; thugs rje). One of the four immeasurables.
Explanation by His Holiness the Dalai Lama
"When I speak of ‘basic human feeling’, I refer to the capacity we all have to empathize with one another. This is what enables us to enter into the pain of others and, to some extent, participate in the pain of others.
Our innate capacity for empathy is the source of that most precious of all human qualities, which in Tibetan we call nyingjé. The term nyingjé has a wealth of meaning that includes: love, affection, kindness, gentleness, generosity of spirit, and warm-heartedness. It does not imply pity; on the contrary, nyingjé denotes a feeling of connection with others. Also, it belongs to that category of emotions which have a more developed cognitive component. So we can understand nyingjé as a combination of empathy and reason.
We can think of empathy as the characteristic of a very warm-hearted or well-meaning person; reason as that of someone who is very practical (and truly intelligent and wise). When the two are put together, the combination is highly effective."