Nine Greek words for love:

​I always thought Love was a hormonal imbalance or a mental instability until mercy poured down upon me.  Then I sought the meaning of love:

• éros: body love and sexual desire or drive; libido. Primal can burn out quickly. 
• philia: brotherly love of "friendship" or affection. The love of platonic to mean, “without physical attraction.” 
• storgē: natural or instinctual affection. The love of a parent for a child and child to parent.
• agápe: God's unconditional love, and of ours for God; the highest form of all-inclusive love.

• ludus: playful affection between connected people; such as lovers.  This is the hormonal imbalance (fluttering heart, flirting, teasing, and feelings of euphoria) and is commonly how we in the West think of the four-letter word LOVE.
• mania: is an imbalance between éros and ludus, it is an obsessive and possessive love in which a person feels self-value.
• pragma: longstanding or enduring love; fidelity of both in the relationship, it is learned, love.
• philautia: love the self, we cannot share what we do not have; in the extreme, this also refers to self-conceit. 

• xenia: is a "love" word with an association to obligation; this is the respect of host to guests in hospitality, "guest-friendship."

It is true, my brain was "re-wired" when I accepted God's agápe and submitted to a pragma-tic relationship in obedience to His will.

Tonight a gentleman, I met two summers ago during a church conference, will spend the weekend with Debbie and I. He is a retired Marketing Executive that travels the country in his RV working at varies campgrounds, not because he is desolate or homeless, but because he likes to travel and meet new people. Tonight, he is dropping off a trailer downtown and asked if he could visit with Debbie and I. My philia responded and we will show the bounds of xenia to our brother in Christ.
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Yes, I have thought about this simple word "love" a little bit.  Love is eudemonia and agápe comes from our desire to share the experience of koinōnia.