Jesus, after giving the Parable of the Sower states the following:
Matthew 13:9 (KJV): Who hath ears to hear, let him hear.
Again this seems to indicate some element of choice, of reflection, a decision to take what Jesus has stated as important and worthy of serious contemplation, and the Hebrew OT word “schema” has the sense of not only hearing, but hearkening and doing. The Seven Letters to the Congregations in Revelation 2-3 all conclude with this admonition, and together with some encouragement, many of the Letters are warnings to repent, again the need to carefully consider and make the correct choice.
But as you indicate God is the source of faith:
Matthew 13:11 (KJV): He answered and said unto them, Because it is given unto you to know the mysteries of the kingdom of heaven, but to them it is not given.
It does not seem to be black and white:
Matthew 13:14-16 (KJV): 14 And in them is fulfilled the prophecy of Esaias, which saith, By hearing ye shall hear, and shall not understand; and seeing ye shall see, and shall not perceive: 15 For this people’s heart is waxed gross, and their ears are dull of hearing, and their eyes they have closed; lest at any time they should see with their eyes, and hear with their ears, and should understand with their heart, and should be converted, and I should heal them. 16 But blessed are your eyes, for they see: and your ears, for they hear.
Perhaps the whole question also revolves around how did the contemporaries of Isaiah and Jesus end up becoming blind and deaf and hard of heart, and how did others become disciples of Isaiah and Jesus. To what extent can we stop, pause and consider and thus choose the right path, and receive the promises that Jesus offered the Congregations in Asia, and bring forth the fruit of the Parable of the Sower, and the Fruit of the Spirit.
Kind regards
Trevor