Vital
It is vital for Christians to engage in acts of considerate service toward one another.
Not just good. Not just nice. Vital.
These acts of service don't have to be programmed. It isn't "vital" for Christians to volunteer for the local food shelf or hospice house or transitional living facility or pregnancy counseling center or thrift store. There are good, but not the same as what's vital. It's also isn't required that people do acts of selfless service through their local congregation. Again, a good thing, but not the point of considerate service.
Organizations and drives and events are a means to an end, and it is this end that makes serving your community (a.k.a. community service, though those words in that order have somehow been transmorgified into something that sounds like a punishment) so important.
Selfless acts of considerate service prove your soul is alive. (And a living soul is vital.)
Apples and ears of corn don't make their respective stalks alive, but if they aren't happening those stalks lack life. They lack vitality.
Anyone who makes the argument that economic success, happiness in the family, contentment with your lot in life, or physical health are the fruit of having faith in what Jesus has done is stopping short of the real point. Those are all signs of God's goodness in life, sure, but they're not the things that make life life.
If you're interested in life that is truly alive, "be rich in good deeds" and "be generous and wiling to share." These are proof of life - and without proof of life, what are you?
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1 Timothy 6:17-19 | Command those who are rich in this present world not to be arrogant nor to put their hope in wealth, which is so uncertain, but to put their hope in God, who richly provides us with everything for our enjoyment. Command them to do good, to be rich in good deeds, and to be generous and willing to share. In this way they will lay up treasure for themselves as a firm foundation for the coming age, so that they may take hold of the life that is truly life.