know one's own mind

Be certain about what one wants; be decisive. For example, Don't ask him; he's so tired that he doesn't know his own mind, or She certainly knows her own mind when it comes to giving stage directions. This term was first recorded in 1824.

Common Names:

Name	Pronounced	Usage
Swain	[swein]
Ezer	-	Biblical, Biblical Hebrew
MÔNica	-	Portuguese
Lorenzo	lo-REN-tso (Italian), lo-REN-tho (Spanish), lo-REN-so (Latin American Spanish)	Italian, Spanish
Sandford	SAN-fərd	English (Rare)
Ronny	RAH-nee	English