One definition of love is a universal wish for others to experience happiness. Compassion is a universal wish for others to be free of suffering. They are not to be confused with our usual self-centred emotional responses which we attach similar names to. However, we are just one of many beings seeking happiness. We then need to empathise with others and to contemplate their suffering.
Faith can refer to many things.
It can mean to have confidence. Without faith most mental healing practices won't work. On the other hand, with faith miracles can be achieved. One way to understand faith is to perceive it as a focuser or magnifier. By focusing our healing efforts through the mind of faith the power of healing is magnified and concentrated.