“The true impact of an action depends on what happens because of that action, not on what happens, period. When we work hard and see positive results, it’s often easy to neglect the fact that some portion of those results would have occurred anyway, or that someone else might have filled our role just as well as we did. There is often a gap between true impact and ‘tangible impact’ – the immediate results of our actions – and understanding that gap is crucial to finding the places where you can make a real difference.”