Another perspective to this is that "Wu Wei" means natural action - as planets revolve around the sun, they "do" this revolving, but without "doing" it; or as trees grow, they "do", but without "doing". Thus knowing when (and how) to act is not knowledge in the sense that one would think "now" is the right time to do "this", but rather just doing it, doing the natural thing."

"There is another less commonly referenced sense of wu wei; "action that does not involve struggle or excessive effort". In this instance, Wu means "without" and Wei means "effort"."