One key to moving forward is ...

One key to moving forward is knowing what to leave behind.
One key to moving forward is knowing what to leave behind.

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Being self-made is a state of mind, and once you put that mentality to work, your success will come.
 Dave East
A lot of people change for good. Some people just fall off. Just trying to progress in anything, no matter what you're doing, I feel like any progression you make... some people aren't gonna be around you that were around you.
 Dave East
There are no secrets to success. It is the result of preparation, hard work, and learning from failure.
Once you get the nod, your mentality totally changes. It's like a heavyweight fighter-you win the title and that's it, you don't want to look back and you don't want to change. That's the way I feel and I'm looking to keep the job.?
 Mark Sanchez
Inspirational leaders need to have a winning mentality in order to inspire respect. It is hard to trust in the leadership of someone who is half-hearted about their purpose, or only sporadic in focus or enthusiasm.
 Sebastian Coe

Quotes from the same author

The public square is more public than ever, but minds are rarely changed in 140 character bursts and by selfies.
It's not reckless, because when we leap, when we dive in, when we begin, only begin, we bring our true nature to the project, we make it personal and urgent. And it's not abandon, not in the sense that we've abandoned our senses or our responsibility. In fact, abandoning the fear of fear that is holding us back is the single best way not to abandon the work, the pure execution of the work. Later, there's time to backpedal and water down. But right now, reckless please.
There are lots of good reasons to abandon a project. Having a little competition is not one of them.
Yes, I think it's okay to abandon the big, established, stuck tribe. It's okay to say to them, "You're not going where I need to go, and there's no way I'm going to persuade all of you to follow me. So rather than standing here watching the opportunities fade away, I'm heading off. I'm betting some of you, the best of you, will follow me.
I intentionally abandoned the hard stuff early on because not only do I think it's useless, I think it's a distraction.