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If you spend all your time working alone, you’re increasing the risk of failure and cheating your potential for growth.
First of all, how do you even know if you’re on the right track?
Imagine you’re a bicycle-design enthusiast, and one day you get a brilliant idea for a completely new way to design a gear shifter. You order parts and proceed to spend weeks holed up in your garage trying to build a prototype. When your neighbor—also a bike advocate—asks you what’s up, you decide not to talk about it. You don’t want anyone to know about your project until it’s absolutely perfect. Another few months go by and you’re having trouble making your prototype work correctly. But because you’re working in secrecy, it’s impossible to solicit advice from your mechanically inclined friends.