天天用英语：第四十五课 - Five theories on the greatest emotion of all
It is a great thing tp start life with a small number of really good books which are your very own.
What is love?
文本：
https://www.theguardian.com/commentisfree/2012/dec/13/what-is-love-five-theories
朗读：
歌曲:
https://y.qq.com/portal/song/000qRAbw1kPe1u.html
小品:
http://v.qq.com/x/page/p0017euq5zi.html
The physicist :Love is chemistry. [is a survival tool]
The psychotherapist:
Love has many guises.(外衣；衣服；形象；样子:外表 ) [is all of the above]
The philosopher:
Love is a passionate commitment. [that we nurture]
The romantic:
Love drives all great stories.
The nun:Love is free yet binds us. [is life's greatest blessing]
Without the commitment, it is mere infatuation.
Without the passion, it is mere dedication.
Without nurturing, even the best can wither and die.
句型：
From a/an ..... perspective, ... can be viewed as....
In order to ..... you need to...
.....is more easily ...than ...
Love is more easily experienced than difined.
That's more easily said than done.
Money is more easily spent than saved.
What love is depends on where you are in relation to it.
拓展阅读：
What does the phrase "it's just a matter of semantics" mean?
https://www.quora.com/What-does-the-phrase-its-just-a-matter-of-semantics-mean
The Ancient Greeks’ 6 Words for Love (And Why Knowing Them Can Change Your Life)
https://en.wikipedia.org/wiki/Color_wheel_theory_of_love
Love is patient and kind. Love is not jealous or boastful or proud or rude. It does not demand its own way. It is not irritable, and it keeps no record of being wronged. It does not rejoice about injustice but rejoices whenever the truth wins out. Love never gives up, never loses faith, is always hopeful, and endures through every circumstance. ——1 Corinthians 13:4-7 (圣经-旧约)
Three things will last forever —— faith, hope, and love —— and the greatest of these is love. ——1 Corinthians 13:13
1 Corinthians 13
New Living Translation
https://www.biblegateway.com/passage/?search=1+Corinthians+13>version=NLT
（多国语言翻译版本）
Although ..., they could ......., especially given...
Presumably by doing..., we can ....
We could also heed the lessons from the research showing that...
forge new frienbdships and social circles