“The choices that are most powerful in generating motivation, in other words, are decisions that do two things: They convince us we’re in control and they endow our actions with larger meaning. Choosing to climb a mountain can become an articulation of love for a daughter. Deciding to stage a nursing home insurrection can become proof that you’re still alive. An internal locus of control emerges when we develop a mental habit of transforming chores into meaningful choices, when we assert that we have authority over our lives.”