Matthew 13:15:

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.

Notes on Matthew 13:15:

There is an important lesson in this verse.  If you hear with your ears, and understand with your heart, and are converted (which I assume that you probably are – if not, please read How to Be Saved from Your Sins immediately), you should expect God to heal you!  The reason so many were not healed (either physically or emotionally) is that they were not listening to God when He spoke.  God was willing to heal them all the time, but the Bible pattern is, “Hear and be healed,” not, “Just try to get healing without any giving time or effort to the study of God’s Word.”

Note that it was the people’s choice to become dull and callous – that wasn’t God’s will.

See also:

John 12:39-41
Acts 28:27
Notes on Acts 28:27
Objection: Matthew 13:15, John 12:39-41 and Acts 28:27 Prove That HEALED in 1 Peter 2:24 Doesn’t Have to Mean Physically Healed
Objection: Vine’s Expository Dictionary Says That 1 Peter 2:24 Is Figurative of Spiritual Healing