As I began reading this section this morning, I recalled, that in the pre-mortal existence that -
"...among all these there were many of the noble and great ones..." (Abraham 3:22)
Obviously, there were varying degrees of valancy. There was one that was more valiant than they all and even in mortal life, He had a veil of forgetfulness placed on Him.. But we learn in the writings of John the Baptist -
"...he received not of the fulness at the first, but received grace for grace;
13 And he received not of the fulness at first, but continued from grace to grace, until he received a fulness;" (Doctrine and Covenants 93:12–13)
He was so valiant that He progressed on earth grace for grace, having no sin or need for repentance..