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Related to authority: accountability
have it on good authority
To know certain information from a reliable source. I have it on good authority that Mom will take us out for ice cream if you finish your vegetables. Once that witness's story was verified, we had it on good authority that the man we'd arrested had in fact committed the crime.
throw (oneself) on/at the mercy of (someone)
To plead with someone, especially a figure of authority, to show one lenience and mercy. I have no excuse for what I did. I can only throw myself on the mercy of the duke and beg for his forgiveness. She threw herself at the mercy of the court, saying that her dependence on drugs led her to commit those crimes.
carry (a lot of) weight (with someone or something)
Fig. to be very influential with someone or some group of people. Your argument does not carry a lot of weight with me. The senator's testimony carried a lot of weight with the council.
carry one's (own) weightand pull one's (own) weight
Fig. to do one's share; to earn one's keep. (The weight is the burden that is the responsibility of someone.) Tom, you must be more helpful around the house. We each have to carry our own weight. Bill, I'm afraid that you can't work here anymore. You just haven't been carrying your weight.
carry weight (with someone)
Fig. to have influence with someone; [for an explanation] to amount to a good argument to use with someone. That carries a lot of weight with the older folks. What you say carries no weight with me.
throw oneself at the mercy of some authorityand throw oneself on the mercy of some authority; throw oneself (up)on someone's mercy
Fig. to seek mercy from a court of law, especially at one's sentencing for a crime; to seek help from an official or institution. He pleaded guilty and threw himself at the mercy of the court. It did no good to throw myself on the mercy of the State Department. Please don't! I throw myself upon your mercy!
Also, carry authority or conviction . Exert influence, authority, or persuasion, as in No matter what the President says, his words always carry weight. Shakespeare combined two of these expressions in Henry VIII (3:2): "Words cannot carry authority so weighty." [c. 1600]
have something on good authority
If you have something on good authority, you believe it is true because you trust the person who told you about it. I have it on good authority that there's no way this light can cause skin cancer. Note: This expression can be varied, for example by using get or be told instead of have. I'm told on good authority that you will be successful in your examinations.
COMMON If a person or their opinion carries weight, they are respected and are able to influence people. Not only do men talk more, but what they say often carries more weight. El Tiempo is Colombia's leading newspaper and its opinions carry considerable weight in the country.