To devote your life to the good of all and to the happiness of all is religion. Whatever you do for your own sake is not religion.
The Absolute cannot be worshipped, so we must worship a manifestation.
The Absolute can never be thought of.
Renunciation is of the mind.
It is the highest manifestation of the power of Vairagya when it takes away even our attraction towards the qualities.
For a warrior, nothing is higher than a war against evil. The warrior confronted with such a war should be pleased, Arjuna, for it comes as an open gate to heaven. But if you do not participate in this battle against evil, you will incur sin, violating your dharma and your honor.