Your knowledge is an island where you grow and expand by walking off of the shores with faith that ground will begin to appear underneath you. If you take an aerial view of this island, at your birth, it looks like a tiny island. It only has one palm tree and some sand around it. However, as you get older and learn things, the island starts to expand. You have had to get your feet wet by walking out and swimming away from your island. The ground begins to appear underneath you as you master new things.
When you float into the unknown waters of another city by swimming, as you become familiar with that place, your island expands. You are no longer swimming, but standing as the ground has come to support you. Standing on your island is stagnating, while navigating away from it is growing and learning.
This is your goal in life. To swim as much as possible and enjoy the island that you create as you go. The more you swim, and the larger your island gets, the richer the vegetation. No longer do you have one palm tree, you have an entire continent from which to develop. You are like a conqueror of the world around you, having amassed land that Columbus could never have discovered by accident. This is the path to mastery. You could always stick around in your hometown and learn just a little. You could refuse to leave your comfort zone and survive only based on what you know today.
But there you will stay, on your island with one palm tree, struggling to stay awake on the beach because of your boredom.