He who does not WISH to see the height of a man, looks all the more sharply at what is low in him, and in the foreground—and thereby betrays himself.
I think Nietzsche is trying to say that all people who look below them never truly accept themselves. They are trying to be someone they are not. They always think the worst of themselves. Due to the person thinking so lowly of them self makes him want to be someone they are not
They never forgive us if they have once made a mistake BEFORE us
To me, I agree with Nietzsche. People today are very judgmental and really do not forgive someone who makes a mistake. That person could have made the same mistake or a greater mistake, but after they are "forgiven" they become hypocrites and do not believe in forgiveness for anyone else. Their virtues become more intact and they believe they cannot forgive someone after they make a mistake.
There is a great ladder of religious cruelty, with many rounds; but three of these are the most important. Once on a time men sacrificed human beings to their God, and perhaps just those they loved the best—
I really agree with Nietzsche here. In the earlier times the people would sacrifice their loved ones, such as their children to their god to show their god how much they loved and believed in him that one day they will be reunited with them. This to many people seem like religious cruelty as Nietzsche points out. What kind of person would sacrifice their own child or beloved to their god? This just was a sign of respect towards their god in their day and age.
The falseness of an opinion is not for us any objection to it
I believe Nietzsche is trying to get across a very important part here. He is trying to tell us that everyone has an opinion and even though it may be false or dis-true in our eyes maybe it is true in that persons eyes. Do not object or argue about someone else's opinion.
Every utterance is a “move” in a game.
Lyotard is trying to say whenever someone speaks they are making a move into the game. This game is knowledge. He believes everything someone says is a move. Lyotard says when he speaks he is speaking of some kind of knowledge where he legitimizes it. So he is "moving" a piece in the game which is knowledge.
These technological transformations can be expected to have a considerable impact on knowledge.
He is saying that with this technology is what is going to give us knowledge. He doesn't think we will have an impact on knowledge without technology. Lyotard does not believe we will have legitimate knowledge because of all this technology. He wants us to legitimate our knowledge and de-legitimate other's knowledge not using technology.