It sends you clients, patients, customers.

It helps you into the best society, even though you are poor.
A man who can talk well, who has the art of putting things in an attractive way, who can interest others immediately by his power of speech, has a very great advantage over one who may know more than he, but who cannot express himself with ease or eloquence.
No matter how expert you may be in any other art or accomplishment, you cannot use your expertness always and everywhere as you can the power to converse well.

If you are a musician, no matter how talented you may be, or how many years you may have spent in perfecting yourself in your specialty, or how much it may have cost you, only comparatively few people can ever hear or appreciate your music.
You may be a fine singer, and yet travel around the world without having an opportunity of showing your accomplishment, or without anyone guessing your specialty.

But wherever you go and in whatever society you are, no matter what your station in life may be, you talk.
You may be a painter, you may have spent years with great masters, and yet, unless you have very marked ability so that your pictures are hung in the salons or in the great art galleries, comparatively few people will ever see them.

But if you are an artist in conversation, everyone who comes in contact with you will see your life-picture, which you have been painting ever since you began to talk.