justify to

justify something to someone

to explain something to someone and show why it is necessary. Please try to justify this to the voters. I can justify your action to no one.
See also: justify
References in classic literature ?
3) that during their military movement they should have at their head a man who could justify to himself and to them the deceptions, robberies, and murders which would have to be committed during that movement.
Sentinel's success has been closely linked to our ability to successfully justify to our customers the financial benefits of a converged AVVID (Cisco's Architecture for Voice, Video and Integrated Data) solution," said Robert Keblusek, vice president business development at Sentinel Technologies, Inc.