Famous quotes containing the words object and/or focus:
“Let’s call something a rigid designator if in every possible world it designates the same object, a non-rigid or accidental designator if that is not the case. Of course we don’t require that the objects exist in all possible worlds.... When we think of a property as essential to an object we usually mean that it is true of that object in any case where it would have existed. A rigid designator of a necessary existent can be called strongly rigid.”
—Saul Kripke (b. 1940)
“If your child is going to develop a healthy personality with the capacity to remain intact and grow, she must learn how to test reality, regulate her impulses, stabilize her moods, integrate her feelings and actions, focus her concentration and plan.”
—Stanley I. Greenspan (20th century)