On the one hand, most people say that you shouldn't push yourself hard. You should take a rest. Take your time.
Pushing hard may lead to burnout/big stress/depression/anxiety/whatever.
On the other hand:
1. I see that well-known people who work hard has some results. Literally, a minute ago I saw a tweet from a guy is very well known, and dedicated his life for one thing. And he's working really hard.
2. For me, it depends. If I don't push myself, if I'm not being strict with myself, if I'm not angry I usually don't get any result. However, after continuous hard-work I eventually got burned out.
So it's really hard to keep balance