It is not enough to be compassionate. You must act. There are two aspects to action. One is to overcome the distortions and afflictions of your own mind, that is, in terms of calming and eventually dispelling anger. This is action out of compassion. The other is more social, more public. When something needs to be done in the world to rectify the wrongs, if one is really concerned with benefitting others, one needs to be engaged, involved.
If science proves facts that conflict with Buddhist understanding, Buddhism must change accordingly. We should always adopt a view that accords with the facts.
Giving up attachment to the world does not mean that you set yourself apart from it. Generating a desire for others to be happy increases your humanity. As you become less attached to the world, you become more humane. As the very purpose of spiritual practice is to help others, you must remain in society.
"The true essence of humankind is kindness. There are other qualities which come from education or knowledge, but it is essential, if one wishes to be a genuine human being and impart satisfying meaning to one's existence, to have a good heart."
A good motivation is what is needed: compassion without dogmatism, without complicated philosophy; just understanding that others are human brothers and sisters and respecting their human rights and dignities. That we humans can help each other is one of our unique human capacities.
Depression seems to be related to fear, anger and frustration. When you're in a bad mood, even if you meet with your friends, you don't take pleasure in their company. But when you're in a good mood, even if things go wrong, you can cope with them without difficulty. This is why putting yourself in a good mood, making a point of developing a sense of loving kindness gives you greater inner strength.
All People and things are interdependent. The world has become so small that no nation can solve its problems alone, in isolation from others. That is why I believe we must all cultivate a sense of responsibility based on love and compassion for each other.
Religion does not mean just precepts, a temple, monastery, or other external signs, for these as well as hearing and thinking are subsidiary factors in taming the mind.
There are a number of qualities which are important for mental peace, but from the little experience I have, I believe that one of the most important factors is human compassion and affection: a sense of caring.