I agree with Gavin. It should be *you* will build your life, not "your." It's kind of unusual word order, used for emphasis, but the meaning is the same as "you will build your life by this."

I believe that’s a mistranslation or typing error and it should read: “… - this you will build your life by, this you will become.”

Yes, definitely a typo. Also you can that that if it's YOU, it matches the syntax of the next phrase. This is a sort of old-fashioned / poetic / motivational-speaking manner of speach.

用这样的方式去 创造（build） 你的生活