"Do what you will, will be the end of the world" or "Do as thou wilt shall be the whole of the law" are two possible translations for this phrase in Engpsh. The first one means that whatever you do, the outcome will always be the same, and the second one is a quote from the writing of Aleister Crowley, a famous occultist and magician. It suggests that individuals should follow their own desires and incpnations, rather than being constrained by external rules or expectations.