Before the Israelites crossed over to take possession of the promised land, the Lord called for Moses to speak to them a message of remembrance and of obedience.
And Moses summoned all Israel and said to them: “You have seen all that the LORD did before your eyes in the land of Egypt, to Pharaoh and to all his servants and to all his land, the great trials that your eyes saw, the signs, and those great wonders. But to this day the LORD has not given you a heart to understand or eyes to see or ears to hear.
Deuteronomy 29:2-4 ESV
In the 40 years they had traveled in the wilderness, the Israelites had experienced many blessings of God along with His holy judgment. Yet in all those years they never completely understood. As Moses said to them, “the Lord has not given you a heart to understand”. So it was the Lord that kept understanding from them. They never seemed to learn from their experiences. We see in the New Testament the same concept. When Jesus is asked why he speaks in parables, he does not respond with a popular answer. He says:
And he answered them, “To you it has been given to know the secrets of the kingdom of heaven, but to them it has not been given. For to the one who has, more will be given, and he will have an abundance, but from the one who has not, even what he has will be taken away. This is why I speak to them in parables, because seeing they do not see, and hearing they do not hear, nor do they understand.
Matthew 13:11-13 ESV
So the understanding of the parables was a gift of God not a product of the parables themselves. They were used by God either to reveal truth to those He gave understanding or to hide truth from those that did not have understanding. In this we are reminded of the sovereign power of God in salvation. Our ability to understand the truth of the Gospel is a gracious gift of the Lord.
As we take this to heart, believers must…
Respond in humility before the Lord and others. It is not by our own cleverness, birthright, nationality, education, or position that we understand anything of God. It is only by the power and will of God. We did not choose Him, He chose us. John 15:16
Give thanks to the Lord for His gift of understanding that flows from a new heart born from above.
Obey the command of the Lord to share the Gospel message with those we come in contact. The Lord has chosen to work through the weakness of believers to save the souls of people in all walks of life. We must act in faith out of love for God and for mankind to bring the life giving message of the Gospel to others. Romans 10:14-15
Be comforted that the miracle of salvation is not a work we are responsible to perform. We are not even required to create the atmosphere or determine the setting for the proclamation of the Gospel. It will never be because of a convincing argument, the right music, the right prayer, or other contrived methods that brings salvation. It is only and always a work of the Lord in spite of our methods and weaknesses. We are commanded to go and make disciples. As we are faithful to the Lord, He will respond in faithfulness to His Word and bring new life to dead souls.