GW2 Pre-purchase & registration open

So according to the details I found on the forums, the Mistwolf elite skill is only available at lvl 30 just like the other elites. Given that, there seemed no point in paying an extra $20 for it. So I bought the standard edition pre-purchase instead. Still $60. =P

Translation please

“天之道，损有余而补不足。人之道，则不然，损不足以奉有余。孰能有余以奉天下？唯有道者，” 《道德经》

Came across this in a fic. I understand only 7/10ths of the words here, much less the meaning. Halp? T_T