Happiness motivates, gives hope, encouragement & confidence in the pursuit of success.
It takes a happy individual to patiently work towards achieving set goals, becoming successful & impactful. No sad, sorrowful or heavy-hearted individual can patiently pursue their dreams.
People sometimes tend to relate success to happiness, which shouldn't be. There are several people out there that are very successful but not happy. This is because success doesn't guarantee happiness.
Happiness brings about sincere pursuit of success & not despiration.