Never ever apologize for your speaking abilities. Even if you have only the speaking ability of a terrified mouse, you'll just increase your suffering.
Most of us think of ourselves as trustworthy. But without realizing it, many of us act as if we are not.
Suppose Bill wants to borrow his neighbour's power drill for a week. He gets on the phone. And while the number is ringing he thinks: it will be rude to ask for the drill right away. So the conversation goes like this.