When I started lifting weights a few years ago (free weights, that is - I tried a few machines at a commercial gym about 10 years ago), my thinking was that I'd push myself hard for the first few months. After that, with a bit of luck I'd enjoy it enough to keep going at a similar pace.
I'm still lifting them a little over three years later, so I guess it worked.
Cody has given himself 16 weeks to perform his own transformation. As you'll see on his blog, he's right at the start of what should be an amazing journey. Pop over and say hello.