"I think we're on the way to doing something special," said Cook.
"But I think we're still at the start of a journey, rather than the end of it. We will enjoy tonight (Saturday), and what we've achieved, but then come back in the next couple of days desperate to start again.
That's where this side is at."
India's much-vaunted batting line-up has failed to make the benchmark score of 300 in six innings so far this series, and indeed have yet to manage the 294 Cook compiled during England's mammoth 710 for seven declared at Edgbaston.
"It's just a lot of credit to the way our bowlers have bowled -- the way we can build pressure continuously at both ends," Cook said.
"All four bowlers, five if you include (the injured) Chris Tremlett, offer something different -- and continue to prey on people's weaknesses.
"It's a pleasure to be the ball-shiner for them, because you know it gets rewards," Cook explained.
"Our job as a batting unit is to try to give them some time off, so they