Sacrifice

When Abraham and Sarah received their blessings, they were promised a progeny that rivaled the sands of the sea in number, and that through their seed all the kingdoms of the world would be blessed.  But they only had one child, Isaac.  So, when the Lord asked Abraham to sacrifice Isaac, it was not just about losing a son.  In some sense, it was also losing the blessings of the Abrahamic covenant.
Regardless, Abraham proved his obedience by being willing to sacrifice his son, and any hope of his blessings that had been promised to him by the Lord.  Of course, we know the angel stopped him and the ram in the thicket was provided.

When the Lord asks us to live the law of chastity, sometimes it seems like He is asking too much.  I remember, when I was a teenager, experiencing all that hormonal desire all directed at guys, that it seemed impossible that I would ever be married in the temple.  All my crushes were on guys.  I read about young men who feel that they can never be fulfilled without a sexual relationship with another guy.  But we are asked to be obedient to the law of chastity.  Like Abraham before us, it may seem like we are giving up our blessing -- our ability to be a happy person.  But if we are obedient, like Abraham, no blessing will be withheld from us.  We are promised everything our Father in Heaven has.  Let's not give up that blessing.