A wolf in sheep's clothing is something dangerous that looks quite safe and innocent.
This idiom means you can offer something to someone, like good advice, but you cannot make them take it.
If you work like a dog, you work very hard.
If you worm information out of somebody, you persuade them to tell you something they wanted to keep from you.
When the world is your oyster, you are getting everything you want from life.
It is difficult to make someone change the way they do something when they have been doing it the same way for a long time
A worm's eye view of something is the view from below, either physically or socially.
This means that it is easier to persuade people if you use polite arguments and flattery than if you are confrontational.
If something isn't very good to start with, you can't do much to improve it.
You can't hide elephants in mouseholes means that some issues/problems/challenges cannot be hidden/concealed but have to be faced and dealt with.