SimchaMinute by Rabbi Avigdor Miller
Once [orange seeds] fall on the ground they know what to do. The seeds are bitter to discourage you from eating them together with the rest of the fruit. These thoughts about the orange are but an indication of the elaborate planning and design underlying the whole world.
The intent in the creation of the orange is not only that you should enjoy the orange but that you should learn from it the greatness of the Creator.
— Ohr Avigdor Hakdama