4 Bible Verses about Obstinacy Against God

And as He noticed it He said to them, "Why are you discussing the fact that you have no bread? Do you not yet know nor understand? Are your minds so dull? Since you have eyes can you not see with them? Since you have ears can you not hear with them? Do you not remember how many basketfuls of pieces you picked up when I broke the five loaves in pieces for the five thousand?" They said to Him, "Twelve."read more.
"And how many hamper-basketfuls of pieces when I broke the seven loaves in pieces for the four thousand?" They said to Him, "Seven." He said to them, "How is it that you do not understand?"

"You people, stubborn in will, heathenish in hearts and ears, you are always resisting the Holy Spirit, as your forefathers did, too.

But of Israel he said: "All day long I have held out my hands to a people that is disobedient and obstinate."

I have much to say to you about Him, but it is difficult to make it clear to you, since you have become so dull in your spiritual senses. For although you ought to be teachers of others because you have been Christians so long, you actually need someone to teach you over and over again the very elements of the truths that God has given us, and you have gotten into such a state that you are in constant need of milk instead of solid food. For everyone who uses milk alone is inexperienced in the message of right-doing; he is only an infant.read more.
But solid food belongs to full-grown men who on account of constant use have their faculties trained to distinguish good and evil.