4 Bible Verses about Obstinacy Against God

And, noticing this, Jesus said to them: "Why are you talking about your being short of bread? Do not you yet see or understand? Are your minds still so slow or comprehension? 'Though you have eyes, do you not see? and though you have ears, do you not hear?' Do not you remember, When I broke up the five loaves for the five thousand, how many baskets of broken pieces you picked up?" "Twelve," they said.read more.
And when the seven for the four thousand, how many basketfuls of broken pieces did you pick up?" "Seven," they said. "Do not you understand now?" he repeated.

O! stubborn race, heathen in heart and ears, you are for ever resisting the Holy Spirit; your ancestors did it, and you are doing it still.

But of the people of Israel he says--'All day long I have stretched out my hands to a people who disobey and contradict.'

Now on this subject I have much to say, but it is difficult to explain it to you, because you have shown yourselves so slow to learn. For whereas, considering the time that has elapsed, you ought to be teaching others, you still need some one to teach you the very alphabet of the Divine Revelation, and need again to be fed with 'milk' instead of with 'solid food.' For every one who still has to take 'milk' knows nothing of the Teaching of Righteousness; he is a mere infant.read more.
But 'solid food' is for Christians of mature faith--those whose faculties have been trained by practice to distinguish right from wrong.