Wu Wei, action without action, is when action is a natural happening; not a contrived one. In all other actions, large amount of energy is spent in thoughts
No wonder the ultimate knowledge transfer is through silence:
Chitram Vata tharor mole vruddha-ishya, guror-yuva,
Gurostu mounam vykhyanam, sishyasthu china samsaya
Strange (to see) old disciples, young teacher, sitting under a banyan tree, Teacher is silent, and students are cleared of all the doubts .