For a moment, envision yourself on a boat. The size and type will depend on your achievements in life. Let's say you think that at the moment, you are at the top of your game and have reached the pinnacle of your success, you might want to think of your boat as a luxury passenger liner like the Titanic (without the iceberg).
If you think that you are a mess, nothing is going right and you see yourself as a total failure, maybe your boat could be a small raft or a life boat (a life vest would be too harsh and technically it is not a vessel).
If you are somewhere in the middle, your boat could be a sailboat, a motorboat or even a yacht.
And yes, you guessed it right, you are the captain of your boat. There are several factors that could affect the direction of your boat, the waves, the weather, the wind. But the real determining factor that affects the everyday direction of your boat is YOU.