'A healthy mindset'? It's not about just being positive or negative. That's too superficial.
Just being positive or negative wouldn't explain the differences between the mindsets of top achievers. It wouldn't explain why some people struggle to recover from setbacks or why they avoid serious challenges because they fear failure.
Yes and no. Yes, if they come with mini-goals and an action-based plan to achieve them. No, if the ambitious goal is really just a dream or fantasy.