in right mind


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in (one's) right mind

Thinking soundly; rational. Usually used to set up a context in which any sane person would or could do, say, or think a certain thing. No one in their right mind agrees to those kind of terms—unless they sign a contract without reading it. You must not be in your right mind if you think that breaking up their wedding is a good idea.
See also: mind, right

in one's right mind

Fig. sane; rational and sensible. (Often in the negative.) That was a stupid thing to do. You're not in your right mind. You can't be in your right mind! That sounds crazy!
See also: mind, right

in one's right mind

In a healthy mental state; sane and rational. For example, No one in his right mind would ski down this icy slope. This expression is often used in a negative construction, as in the example. The positive sense appears in the New Testament (Mark 5:15), where a deranged man whom Jesus helped is now "sitting, and clothed, and in his right mind." The antonym out of one's mind, as in You must be out of your mind to swim in that icy stream, is from the same period. [c. 1600] Also see go out of one's mind.
See also: mind, right