Hold on to your butts, because I'm about to spout off a bunch of cliches.
"Can we win in the first quarter? No! Can we win in the second quarter? No! Can we win in the third quarter? No! Can we win in the 4th quarter? Yes!" (edit: actually overtime in this case but you get it).
Pete Carroll most likely just led the Seahawks in this rousing question and answer cheer, and it's a belief system that I have known for a while. During my brief stint with the PLU football program under the legendary Frosty Westering, one of the most oft-used mantras was "The longer we play, the better we get." This Frostyism has been wholly adopted by the Seattle Seahawks. They wore out the Texans after Houston jumped out to a commanding early lead, grabbing momentum back, getting back to their identity, and eventually coming out ahead.
After an atrocious, somewhat embarrassing first half of football where Seattle went into the locker room down 20-3 while losing one of their best players in Michael Bennett to a scary back injury, the Hawks' defense stiffened up in the third quarter, allowing the offense to chip their way back into the game. A Richard Sherman pick-six with 2:40 remaining in the game tied it up, and after going to overtime, the leg of Steven Hauschka sealed the deal.
This was one of the grittiest wins I've ever seen the Seahawks pull out. Their 14-play, net-113 yard drive spanning parts of the late and early fourth quarter, was an all-timer, necessitating magical plays from Doug Baldwin and miraculous escapes from Russell Wilson, and put the Hawks within a touchdown after the game looked well out of hand. Sherman's pick six tied it, and with a number of steely, solid defensive stops, Seattle drove into Houston territory to kick a field goal and win the game.
There will be much more on this game soon, but bask in Seattle's 4-0 start for now.