Service is life. No service means, spiritually no life.
The more serious you are about spiritual life, the more you keep your mind in captivity.
Preaching means to awaken the real inclination to serve God.
Where there is no inner freedom, there is no life.
Reducing carbon emissions is important, but it is shortsighted if not coupled with reducing the toxic emissions from our heart; and that is something spiritual leaders are supposed to teach and something all thinking people, regardless of their beliefs, should practice.
In a relationship the way to overcome problems, is to focus our attention on higher principles that can help us transcend them.