Being in the Now. — Listen. Can you hear the wind? And can you hear the birds singing? You have to HEAR IT. Empty your mind. You know how water fills a cup? It BECOMES that cup. You have to think about nothing. You have to BECOME nothing.
To stand on the outside and try to look inside is futile; whatever was there will go away. This also applies to a nebulous thing described as “Happiness.” To try to identify it is like turning on a light to look at darkness. Analyze it, and it is gone.