There s no sin so wicked and depraved as this of Judas. He knew the Lord Jesus well, saw His miracles and bore the money bag. He was trusted. He felt the love that Jesus showed to people. He saw the prophesies being fulfilled before his eyes, that Jesus was the Messiah, the Son of God. Sadly though satan found entrance, little by little. We don t know the exact cause, but maybe he was proud that he had a position that was higher than the others. He was trusted by the others and the Lord to be the treasurer. A person can be proud because of anything, their clothing, position, beauty, wealth etc.