"I'm really looking forward to the game and the final. It's a huge game for me and for it to be at Eden Park, one of the best stadiums in the world, it doesn't get any better."
"It's going to be a big physical game against the Springboks, and we know that. They will be looking at their kicking game a lot so we have to make sure we get it right on the pitch.
"They picked a squad for the conditions, big abrasive lads for the rain but the conditions out here have been alright. It's obvious they will look to physically dominate teams but we do have to step up and match them in that department and I know that we definitely can.
"The game in last year's tournament was tough, we matched them physically and we know, had we had an extra few minutes, we would have won that game."
The game against Ireland saw the English blow their Six Nations' opponents away in the opening half to reach the semi-final, in a performance that Moriarty was thrilled with.
Watch the highlights of England U20's #JWC2014 semi-final win here: http://t.co/dG81i45u1C pic.twitter.com/GgAWus4sQ5
- England Rugby (@EnglandRugby) June 16, 2014
"First half was brilliant, everything came together and we showed that we got our basics right, were able to add the extras on top of that and we managed to run in a few tries.
"In the final, we have to do the same again, match them physically, run them around and then earn the right to express ourselves and run in some tries."
And, with Moriarty on his second Junior World Championship adventure, it's a summer activity that he is really relishing.
"I'm really learning with every game in this tournament, and every game is a different challenge where we are analysing a lot of different teams and styles of play so it's great for my development."
.The new @gloucesterrugby clique! @BillyBurns10 @henrypurdy_ @CallumBraley #friends pic.twitter.com/CpSnMio2ds
- Stefan Curtis (@Stefanjc) June 17, 2014
With tour mates, Henry Purdy and Callum Braley heading back with Moriarty to begin their Gloucester careers at the end of the tournament, the back rower is really excited about the new faces in the squad.
"Both players are going to have big parts to play next season at the club, I know Callum from Hartpury so it's good to be back with him, and then I get on really well with Henry. He's a super player and both lads, along with Billy will fit in really well in an exciting squad next year."