He illustrates this with a simple but vivid analogy. "If they were originally eating rice gruel, then at first we will eat it with them, but after a while we will suggest that once a week they should drink milk. Then we'll try to gradually wean them onto more, and if we can get them drinking it three days a week, then we think we've done very well."
為此他做了一個淺顯卻傳神的比喻，「如果他們原來是吃稀飯，我們就先陪著吃，然後建議他吃一天牛奶，再慢慢增加次數，只要一星期能有三天，我們就可以算是很成功了。」