Chisao master = Wing chun master

My teacher often said that a Chisao master = Wing chun master

So what is a chisao master?
First of all, it's someone who can deal with anyone and still control their own temper. 
If you cannot control yourself, you cannot control anyone else. In chisao you learn to control your own actions in a way that gives you a way to deflect your opponent's defenses rather than forcing your way through.
This way enables a somewhat smaller person to defeat a bigger opponent.
Be humble, stop fighting and start just reacting and you'll improve so much faster.

So what is chisao then?
 Chisao is a drill that teaches you to defend and attack at the same time. It teaches you to avoid using power against power by using contact reflexes and it teaches you to chain your attacks to tear down your opponents defenses.

By learning how to use both hands together your handspeed will become incredibly fast.

Using drilled contact reflexes mean that you will further increase your speed because you don't have to "choose" a technique. Your body has already been programmed to react in the most efficient way.

Chained techniques increase your fighting power beyond your size by constantly keeping your opponent on the defense and defeating him without leaving him any chance to get back into the fight before it's over.