Here is his full paragraph on the topic:
Pride - The sinful drive that distorts proper self love so that we esteem ourself more than is proper and at the same time denigrate the goodness of others. There is such a thing as well ordered self love and self esteem but Pride is love of self which is perverted causes us unjustly to think of others as beneath us or less worthy. Pride also stirs us to reject lawful authority of others over us including God and refuses appropriate submission. Pride is at the root of every sin for through it we pridefully think we have a way better than what God has set forth or that we alone can be the judge of right and wrong. Adam and Eve wanted to “be like Gods” and wanted themselves to determine what was right and wrong. Hence they demanded to eat of the tree of the “Knowledge of good and evil.” This is Pride.
Jesus commands us "Love your neighbor as yourself". The self-love Jesus commands would seem to involve understanding the truth about oneself. The sin of Pride would seem to involve falsely elevating oneself.
I have had various thoughts about it. Perhaps I am being too scrupulous. Maybe people who use this are unaware of it having the meaning that I ascribe to it.
Who determines whether we have thought unjustly of another? There has always been, and always will be, people that are less worthy, who determines that?
Who determines whether the authority of others over us, should be rejected or not?