HR practices do not exist to make employees happy but to help them become committed. HR professionals must help managers commit employees and administer policies. HR is full of fads. HR practices have evolved over time. HR professional must see their current work as part of an evolutionary chain and explain their work with less jargon and more authority.
HR is staffed by nice people.
At times, HR practices should force vigorous debates. HR professionals should be confrontative and challenging as well as supportive. HR is HR's job. HR work is as important to line managers as are finance, strategy, and other business domains. HR professionals should join with managers in championing HR issues.