I have hardship to understand who the knight of faith is after reading an exerpt from Fear and Trembling:
"The tragic hero assures himself that the ethical obligation is totally present in him by transforming it into a wish. Agamemnon, for example, can say: To me the proof that I am not violating my fatherly duty is that my duty is my one and only wish. Consequently we have wish and duty face to face with each other. Happy is the life in which they coincide, in which my wish is my duty and the reverse, and for most men the task in life is simply to adhere to their duty and to transform it by their enthusiasm into their wish. The tragic hero gives up his wish in order to fulfill his duty. For the knight of faith, wish and duty are also identical, but he is required to give up both. If he wants to relinquish by giving up his wish, he finds no rest, for it is indeed his duty. If he wants to adhere to the duty and to his wish, he does not become the knight of faith, for the absolute duty specifically demanded that he should give it up. The tragic hero found a higher expression of duty but not an absolute duty.
I understand somebody who gives up his desires in order to realize his duty like Agamemnon, but I don't understand the difference Kierkegaard makes with Abraham. Indeed, according to the Wikipedia's article, Abraham became a knight of faith because he was willing to do what God asked of him, that is to say by actually lifting the knife with the intention of carrying out his mission. In short, he acted. Here the intention was more important than the result. He had faith and had to go no further to please God. So was Abraham different from Agamemnon only because the last one said a few words before: saying it was his duty as a father to follow his duty as his only desire ?
I do not see the scope of the text either. To what extent is it important that we still look at it as an important text? It looks like masochism.
Can you explain it as if I was a high-school student ?