Hence the Persistence of Force is the ultimate basis of knowledge.

Deidre wasn't certain if there was any affection for his daughter, though his persistence in healing her was a sign of either care or obligation.

The definiteness and persistence of this creed, which of course is the strength also of Mahommedanism, presents a contrast to the fluid character of the statements in the Vedas, and to the chaos of conflicting opinions of philosophers among the Greeks and Romans.

There are also traces of the persistence of descent in the female line, especially in the case of the Pictish royal family, but such survivals of savage institutions, or such a modification of male descent for the purpose of ensuring the purity of the royal blood, yield no firm ground for a decision as to whether the Picts were " Aryans " or " non-Aryans."

With persistence, the medical volunteers doggedly worked to find a solution to the family's health crisis.