This answer won't help all that much, because I have a hard time understanding it myself, but the cosmos has more than one horizon as far as observation goes. There's a universal event horizon, the particle horizon, and the Hubble distance, I think.

Basically, we can see the light of objects that are farther away from us than 14 billion light years because the space between us is expanding, and the space near an object that far away/back in time is expanding incredibly quickly.