How man seek, merge and be union with God (Heaven)

Heaven is all about how you (man) REALIZE to seek the conscious of God who is your own being 

Man seek the pleasure of God when he love and serve humanity 

By being sincere, modest, peaceful, content, sensitive to injustice, selfless, simple and efface achievements and dislike recognition to suppress his ego 

And he seek love, spread peace, unity and live in harmony within and without during his short life on earth

However

Man, without righteously and consciously serve humanity 

claiming to believe, worship and glorify a God strongly cannot do much