There are projects that you can take on that have a clear end point: when you’re done, you’re done. You can build a boat, or write a novel, or take a journey around the world.
Then there are projects that you can take on that you will never ever be done with: rather, they become a part of your daily life; eventually, a part of your identity; you will strive to the end of your days to finish them and you never will. You can train to improve your personal best 40 km cycling time trial, or endeavour to truly express your vision in photography, … or you can learn a language.
There is no such thing as done. There will always be more to learn, more depths to plumb, deeper understanding of grammar, keener intuition of expressing yourself in writing, broader knowledge of literature, more refined sensitivity to connotations, more idioms and sayings to appreciate; and the perfect brush stroke will elude you for a lifetime, just as it has thousands of calligraphy masters before you.
And this is something that I am grateful for, and would never wish to change.