First, courage. Because it requires you to resist your innate desire to resist pain, and feel the suffering of another as if it’s your own. This is the heart component of compassion.
Second, wisdom. Because you need to be able to not drown in the pain so that you can discern the essence of the situation. This is the mind component of compassion
Third, power. This represents both the ability and the authority to take the necessary actions to alleviate the suffering. This is the doing component of compassion.