I had the good fortune to meet two great spiritual teachers, Rabbi Solomon David Sassoon and the Dalai Lama. When asked, “What is your own religion?” they both answered, “Kindness.”
It may be that what we call kindness, compassion and responsibility all point similarly to responding relevantly. As the Buddha clarified, “If someone needs something, give it to him.”
When we behave kindly, we are aware of our own needs and the needs of others and respond relevantly.
When we are compassionate, we relate to the distress and suffering of all beings with the deep commitment to reducing all suffering equally and without discrimination.
When we act responsibly, we respond appropriately to the needs of the moment
These are not essentially different. What they have in common is the elimination of conflict of interest. Instead of identifying ourselves as separate from others, we simply respond to whatever need arises in a direct and simple manner, with the intention of decreasing suffering and increasing overall happiness to the extent possible each moment.
This way, life is easier.