Growth is the byproduct of incremental stretching.
Constantly pushing it bit by bit, increasing the load over time.
Following a path that stretches you is the key to this, a path of a deep goal.
This path forces you to do more and more uncomfortable things every day.
Sometimes that stretch is speaking in front of people, writing publicly, going for it etc.
Adapting to this stretch, the stress of the new situation, opens up new versions of yourself.
As it scales to the increasing load and stretch, you will continue to open up deeper and stronger versions of yourself.
You will never know how deep in the stretch you can go until you try.
Push it to the breaking point.