WHAT IS LOVE?

Nagtanong-tanong ako, sa kung sino-sinong tao. Ang tanong ko: What is love?
Sabi nila "Love is a four-lettered word that has only one syllable. It also starts with letter 'L' and ends with the letter 'E' ", "Love is when you can sacrifice, even though it hurts inside", "Love is just a word that has always been misunderstood since the day that people who're flirt was born", "Love is a very powerful thing that causes the brain to malfunction during quizzes and exams", "Love is in the air. Let us not breathe, we might die".
Pero ano nga ba talaga ang LOVE?