With an iceberg, much of what they truly are is hidden below the surface. On the other hand, pine trees generally have very shallow root systems compared their overall height. The exact opposite of an iceberg.
With the pine tree, what you see is what you get. With an iceberg, the true character of it is mostly hidden. So which one are you?
We should strive to be pine trees. Let the world know who you are and what you stand for. There's something to be said about holding a portion of yourself back. We all have intimate details that they world doesn't need to know. But, when it comes to your character, your passions, your interests and you... be a pine tree!