How can I show support to a person who loves serving people?

I'm talking with someone who recently opened up to me that he loves volunteering and community service. I don't have a problem with that. He says he likes me but wishes that I came earlier in his life, before having other priorities like serving the masses. What should I do to make him feel that I can support him and his passion for people?
How can I show support to a person who loves serving people?
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