The ancient Greek language had different specific words to convey different forms of love.
Agape (ἀγάπη agápē) or agapo in the ancient Greek was the love of God for people.
Eros (ἔρως érōs) came from the Greek deity Eros and was the love of passion between lovers.
Philia (φιλία philía) was the dispassionate virtuous love of friends, family, community.
Storge (στοργή storgē) was an inherent natural affection, in the context of a parent for a child.
Xenia (ξενία xenía) was the hospitality between a host and a guest.
The conceptual reference of love to those who serve is the Greek language's virtuous love of friends and community.
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