Following on from the previous post, Kevin DeYoung lists 10 items originally by  John Witherspoon on raising children and parental authority here.

Of particular note are the following three comments on a parent’s authority or lack of it:

•  There is not a more disgusting sight than the impotent rage of a parent who has no authority.
• Let it always be seen that you are more displeased at sin than at folly.
• Many parents are much more ready to tell their children such or such a thing is mean, and not like a gentleman, than to warn them that they will incur the displeasure of their Maker.