Love, compassionate love, is why despite the heartaches, the heart breaks, the stumbling, the failures, the disappointments, the annoyances of dating, the everything, I am an absolute sucker for weddings.
Any wise person with intimate experience of risk knows any risk takes faith, but risk done in wisdom also takes knowledge.
But I think Judas and Peter had similar hearts, fallible human hearts like ours. I think the same doubts that plagued Peter were the same doubts that prevented Judas from coming back to Jesus and the other disciples. I think the same faith that caused Judas to return the money in repentance was the same faith that propelled Peter to weep bitterly and then wait in hope with the other disciples.
In both IV technique and faith life, it's difficult to move from a sense of knowing and seeing to a sense of unknowing and hope before taking a risk.