This question was famously asked to Jesus Christ in Luke 10:25-29:
Just then a lawyer stood up to test Jesus. “Teacher,” he said, “what must I do to inherit eternal life?” He said to him, “What is written in the law? What do you read there?” He answered, “You shall love the Lord your God with all your heart, and with all your soul, and with all your strength, and with all your mind; and your neighbor as yourself.” And he said to him, “You have given the right answer; do this, and you will live.” But wanting to justify himself, he asked Jesus, “And who is my neighbor?” (NRSV)
The answer that followed was the parable of the Good Samaritan.
Here are my posts about strengthening relationships with our local, regional, national, and global communities: