This is a really tough question to answer. Hardworking for the better part is equal to success. But there are still a percentage of people in the world who did everything right and still never succeeded. There's the mantra that parents keep repeating in my country. "Go to school, work hard, when you graduate you'll be successful" I've heard it over a million times in my life but what I see everyday always disputes it.

So basically my answer to your question is yes, hardworking is equal to success in life... If you're lucky