Great talker, great liar. [ French Proverb ]

Discretion
And hard valour are the twins of honour,
And, nursed together, make a conqueror;
Divided, but a talker. [ Beaumont and Fletcher ]

The eternal talker neither hears nor learns. [ Proverb ]

No great talker ever did any great thing yet in this world. [ Ouida ]

It is very seldom that a great talker hath either discretion or good manners. [ Proverb ]

The habit of committing our thoughts to writing is a powerful means of expanding the mind, and producing a logical and systematic arrangement of our views and opinions. It is this which gives the writer a vast superiority, as to the accuracy and extent of his conceptions, over the mere talker. No one can ever hope to know the principles of any art or science thoroughly who does not write as well as read upon the subject. [ Blakey ]