Perhaps, language should be looked upon as a tree and a valuable possession: frequently absorb nutriment (adjust vocabulary) and trim the limb (check grammar). Learning grammar and a good vocabulary is just like a tree that often absorbs nutriment and trims the limb. The limb provides the framework and guidance tree need for the growth of the tree, but it won't decide the shape of the tree, how many leaves it will come into. Here, a good vocabulary makes the tree to absorb more nutriment. Equipped with grammar the limb makes the trees grow into great trees, absorbing nutriment helps trees to grow better.