Flanker Peter O'Mahony says it is the fear of failure that propels Ireland forward.
"Fear is something that always drives me," he said.
"It is something that we have always used - fear of losing and letting your team down, fear of not playing well in the green jersey, fear of letting the fans down.
"It always plays a card for you. If you are not fearful before an international you might as well go away home."
A sane man could be forgiven for looking at South Africa in The Rugby Championship, especially against New Zealand, and fearing the worst for Ireland this evening.
O'Mahony has wiped out the overall impression to come away with a clean mental slate.
"It's a different series now. They are not playing the All Blacks now, they are playing Ireland. We have prepared accordingly.
There is no surprise that the Munster man is not interested in looking back over his shoulder at what has happened at Paris in Spring.
"It certainly gave us confidence but South Africa aren't in the Six Nations. They are a different test and are coming off the back of a long run together.
"We have had to get ourselves together quite quickly. It is a big test for us."
The Six Nations did put in place a minimum standard of practice and play. It is a base.
"For this weekend we have to be more physical. We have got to be technically better come breakdown," he said.
"We got away with some things that we won't get away with (6 Nations). Not that we were illegal, we just weren't fast enough to some breakdowns.
"You have guys like (Duane) Vermeulen and (Marcell) Coetzee who will be over the ball so fast. (Bryan) Habana even. The Du Plessis (Bismarck and Jannie) brothers. There's six or eight guys who are a real poach threat.
"With a lot of teams you won't have that so we have to be quick come breakdown. That's where rugby is gone and it is certainly an area we will have to improve on."
What has Ireland got in the locker?
"I think you have seen the way we play the game," he stated.
"We always come back to our core values, our basics that we pride ourselves on. Basics and discipline are two things that will be huge.
"Our basics are our scrum, our lineout, our tackle, our breakdown. It comes back to the basics of rugby at all times, especially against South Africa. If we don't do them we will get punished and we will get punished fast."