To the Paramis, his past Paramis according to what I understand.
He seemed to have a supreme confidence in his ability to become enlightened. I would imagine he developed that over the many lifetimes that he developed his Paramis. If actually the legend is true and he had the ability to become enlightened when he made the Bodhisattva vow, and if he vowed to perfect those Paramis over many lifetimes, I would imagine the accumulated confidence over those many lifetimes would be rather strong. So he seemed to have a supreme confidence in his ability to become enlightened and a supreme confidence in the capacity of the human being to find out the truth. So, it appears that due to his Parami development and the accumulated strength from that, there seems to be an accumulation of confidence. One of the Buddha statue postures I like the most happens to be the hand touching the ground, where he calls the Earth to witness. Supposedly Mara was attacking him and saying he didn't have the power to become enlightened, and then he put his hand to the ground and called the Earth to witness that he had the capacity to be enlightened. So, whenever you have doubts it is good to look at the Buddha statue with the hand touching the ground and remember the human potential, my favorite Buddha statue posture. And if Mara is attacking us, it is a good reflection on the Buddha at that time, just to put our hand to the ground. I believe it is very powerful.