You've been building more than just mass for the last five weeks. You've been straining and attacking your muscles, first with heavy compound lifts and then with precise isolation work. The analogy of a sculptor using a lineup of large and small chisels has been used countless times to describe this type of training, and with good reason. When you succeed in creating a new standard of tension and pump in precise parts of your arms or shoulders, it can sometimes seem like an out-of-body experience. Here's how Arnold described it in the book "Pumping Iron:"
"You don't really see a muscle as part of you, in a way. You see it as a thing. You look at it as a thing and you say, 'Well, this thing has to be built little longer, the biceps has to be longer or the triceps has to be thicker here in the elbow area.' And you look at it and it doesn't even seem to belong to you. Like a sculpture. Then after looking at it a sculptor goes in and works a little bit, and you do maybe some extra forced reps to get this lower part out. You form it. Just like sculpture."
This is where all the hours you've spent in the gym over the last month begins pay off. See it, feel it, and then build it today.