"There are bigger fish at play here. It's a great opportunity to win a test match in New Zealand and we all know what a great feeling that is."
Rolling Sri Lanka for 138 set New Zealand up to push on for a fifth test win in nine matches this year.
"That first innings was something pretty special and it just seemed to all happen against a quality side. It was brilliant."
New Zealand didn't achieve the same success second time around, with Sri Lankan openers Karunaratne and Kaushal Silva making it to 84 without loss by stumps.
Boult gave Sri Lanka's openers a pat on the back, too.
"The ball still swung about and occasionally beat the bat, but Karunaratne and Silva battled hard and got a good result.
"They did it pretty nicely. A lot of credit is due to them for doing what they did."
Boult sees today as being about discipline and sticking to plans but cautioned against trying to "search" too much and thinking "it's all going to happen like it did early today".
"The likes of building pressure and keeping it pretty simple," he surmised. "Just looking for that variation out of the wicket is going to be key. It's looking for that assistance, swinging the ball, and from the wicket. Not too much changes."