'Difficult' in the Bible

For this nation’s heart has grown hard,And with their ears they hardly hear,And they have [tightly] closed their eyes,Otherwise they would see with their eyes,And hear with their ears,And understand with their heart, and turn [to Me]And I would heal them [spiritually].’

Jesus said to His disciples, “I assure you and most solemnly say to you, it is difficult for a rich man [who clings to possessions and status as security] to enter the kingdom of heaven.