happiness is...

When a person spends his entire day with no other concern but Allah alone, Allah [subhaanahu wa ta’ala] will take care of all his needs and take care of all that is worrying him. He will empty his heart so that it will be filled only with love for Him, free his tongue so that it will speak only in remembrance of Him [dhikr], and cause all his faculties to work only in obedience to Him.