幸福就是幸福 happiness,well-being, 爱就是爱 love,

response to 哈佛75年来耗巨资求解“幸福密码”：幸福就是爱
幸福就是幸福 happiness,well-being, 爱就是爱 love,
Happiness is above love, for love is involved, sometimes with suffering, but happiness can be free from it.
幸福 vs. 爱 --distinguished by 高度 力度 深度 广度
大慈悲,博愛 charity > 愛 love > selfish 愛

Love involved IN suffering or happiness in some individual associated WITH "不老男人", does not need 75年 to prove, both are not required necessarily by time.
"In logic, necessity and sufficiency are implicational relationships between statements.[citation needed] The assertion that one statement is a necessary and sufficient condition of another means that the former statement is true if and only if the latter is true. That is, the two statements must be either simultaneously true or simultaneously false. In ordinary English, ‘necessary’ and ‘sufficient’ indicate relations between conditions or states of affairs, not statements. Being male sibling is a necessary and sufficient condition for being a brother. Fred’s being a male sibling is necessary and sufficient for the truth of the statement that Fred is a brother." So, we may say love is necessary but not sufficient, one needs to pursue further happiness as it become social trend in current society, :) just kidding.
thx 不老男人 ! yours is an eye catching majia for freshness.