By asking the angel for his name, Yaakov Avinu sought to determine the nature of his mission. The angel replied that he had no established name, since the names of angels change in accordance with their mission. A person's name indicates his essence and true nature. Adam HaRishon gave names to all of the animals. He perceived their positive attributes that defined their essence, and he gave them names which corresponded to those characteristics.
Evil has no foundation, no stability, no permanent basis.
He understood that the pleasures and allures of this world are passing and of no lasting value. Eisav's guardian angel, alias Satan, also known as the yetzer hora, evil inclination, is well aware of the truth. He is nothing. Horav Yosef Konvitz, zl, one of the early pioneers of Orthodoxy in America, applied this pasuk to explain the dismal state of Jewish observance in the early part of the twentieth century. Most Jews at the time viewed every aspect of religious life with a haphazard, begrudging, even antagonistic attitude.