I have always imagined Tarzan letting go of the previous vine and flying forward in free-fall for a second before grasping the next one, sort of like Spider-man

I have always imagined Tarzan letting go of the previous vine and flying forward in free-fall for a second before grasping the next one, sort of like Spider-man. What's more, if he did hold onto the old vine, and missed the new vine, he's going to swing backward, helplessly out of control and unable to either proceed or retreat. All in all, not the best visual metaphor. That said, certainly it's good advice and common sense that you carefully plan out your next career more rather than plunge blindly ahead, burning bridges behind you. But when you know something's right, you just feel it in your bones. The catch is that the money might not be there at the outset. But if you have planned ahead and stashed a year or two's living expenses, then you will have probably enough time to determine whether you have made a good decision or whether you need to go back to what you were doing.