It doesn't mean that you've got to turn into an extrovert and burn out, because that's no use for anyone, but what it does mean is that you should value the skills and the traits that you have that activism needs.
Não significa que têm de ser extrovertidos e ficarem esgotados, isso não ajuda ninguém, mas quer dizer que devem valorizar as vossas competências e características de que o ativismo precisa.