have it on good/excellent authority

:  of a favorable character or tendency

:  bountiful, fertile

:  handsome, attractive

:  something that is good

:  something conforming to the moral order of the universe

:  praiseworthy character :  goodness

:  well

: used as an intensive

:  superior

:  very good of its kind :  eminently good :  first-class

:  power to influence or command thought, opinion, or behavior

:  freedom granted by one in authority :  right

:  persons in command