Many stutterers are fluent, you know why? Because they desire to be fluent. Life is made of desires, you can not run from it except you want to Saint. Desire of knowledge makes a person a knowledgeable. Desire is root of growth, you don't want to grow thats also fine you can live with what you have, but remember the person who desire to be something in life, will fail many times(suffer with pain) but will achieve one day, you know why because they try. In grand perspective, Evolution is also desire to be alive, animals evolve in harsh condition. Desire is strongly connected to growth.