Second...
Second: If you take a look at the living conditions of the Messengers, peace be with them, and if you believe the reports they brought about issues related to this life and to the Hereafter, to the promises they made of eternal happiness… If you come to know that what they had brought came from Allah, the most Great, the most High, if you moreover believe that their speech is divinely protected from error and safeguarded from mistakes and inclinations, and if you hear about the rewards promised for any type of calamity as you will see and hear…, you will then find its taking place easy, and you will come to know that you have in it ultimate benefit and perfect perpetual happiness, and that you have prepared for yourself safeguarded treasures, Nay!
You have protection, a fortress, a shield from painful torment and immense penalty of Hereafter which no human can ever withstand, nor can anyone be strong enough to tolerate, in addition to your son being your partner in this happiness! You and he, then, are the winners; so, you should not fret and lose patience.
Take this example: If something magnanimous assails you, if a lion or a snake leaps on you, or if a fire overtakes you, and if you have with you the most precious of your sons and the dearest to your heart while there is in your company one of the prophets whose truthfulness you do not doubt.
And if he tells you that if you offer your son in your stead, you and your son will be saved, but if you do not do so, you will be annihilated, while you do not know if your son will be harmed or not…, will a rational person doubt that offering the son as a sacrifice will mean achieving the safety of the son and, in addition to that, the father, too, will be safe, that this will be the ultimate benefit and that the opposite, the father and the son being exposed to harm, is nothing but a pitiful conclusion!
Perhaps many people prefer their own safety over that of their sons, offering the latter as sacrifices even if they are sure that they will be harmed as is the case when in valleys during times of famine. All this takes place during a single hour in a fire or in peril, and after it one may be transferred to comfort and to Paradise; so, what would you think about pain which remains without an end and stays for many, many "years"?
Surely a : "day" with your Lord of these days is like a thousand years of our own calculation.