“The Old Testament had a curious law (to the modern mind). When someone was flogged, an upper limit was placed on how far the discipline could go. ‘Forty stripes he may give him, and not exceed; lest, if he should exceed, and beat him above these with many stripes, then thy brother should seem vile unto thee’ (Deut. 25:3). In other words, the dignity of the one being disciplined was to be kept in mind (and protected) from the beginning of the process to the end of it.
“This principle is neglected by many parents who humiliate their children in addition to the discipline they actually administer. Discipline should be painful but not degrading. Some examples of things that could be more humiliating than they are painful (and therefore more disobedient than they are corrective) would include striking a child in the face, spanking in front of the rest of the family, upbraiding the child in front of others, and so on. Children of course need to be disciplined, but they should never be insulted. They may feel insulted or put upon, but that feeling should always be part of the bad attitude being addressed by the discipline. The feeling, in other words, should not be justified; the parents should not be objectively insulting or degrading the one who is being disciplined.
“There are different ways to insult children. One is to substitute insult for discipline. ‘Your sister never acts like that.’ Yet another way for parents to stumble at this point is to apply discipline inappropriate to the age of the child. Discipline should be calm, judicious, and done in such a way that the form of discipline doesn’t cause the one disciplined to ‘seem vile.'” (My Life for Yours, p. 124-125)
You Think Too Much! 
This beautiful reminder how much God loves us, even He set limits on how much, hard we should be disciplined.