This sentence implies that the answer should be found in the three words follow, tell and do. Let’s talk about heel first. Divide heel into two parts, namely foot and gen. The word "gen" with a little added is the word "good". Just be more discerning, find good people, and follow good people is to follow the right people. Let’s look at words again. The separation of words is words and wells, which means you should be careful when speaking and don’t fall into the traps set by others. It means dialogue. Finally, when looking at the word "zuo", the word "zuo" can be divided into "Ren" and "Gu", which means learning more from old friends and summing up experience is called "right things".