The speaker plays a cruel joke on someone and then criticizes him for it. He tells a man there is "no only way," then pulls the chair out from under him and announces, "i dont like your methods." The irony is sharp: the speaker lectures about open-mindedness while acting with careless aggression, and the "advice" of the title turns into a kind of attack.
In the second part, the man returns with half a soapbox glued to each foot. It's an odd, funny image. A soapbox is where people stand to preach, so he seems to have turned his own way of speaking into something he's now stuck wearing, or he's raised himself up as a defense. Either way, he walks awkwardly. The last stanza is quietly sad: he feels foolish, yet he is "otherwise comfortable." The mood is dry, wry, and a little uneasy. The poem seems to say that clumsy criticism can leave people limping, but also that they may adapt and carry on.