Focus is the key virtue in running a successful enterprise. It takes a sec to lose focus or get carried away on some new idea.
Having a core and sticking to it instead of pivoting over the advice of outsiders is a disaster for failure.
Most of us in this era can easily get carried away with influencers or friends who have got no skin in the name.
A lot of self-belief is needed to stay focused. This is where a mentor comes to rescue, they keep reminding you about the basic aka focus.