Manager vs Leader

Today I read a article and below statement is very interesting. Managers do things right, and leaders do the right thing. Then a manager who has a leadership will do the right things right. It reminds me a concept which a Chinese guy "Sun Tzu" said 2000 years ago in "The Art of War": a Strategist is making sure they are doing the right thing, and a Tactician is making sure the army is doing the thing right.