The very prayer you have lifted up is a beautiful echo of God's own desire. He is already speaking; your request is simply aligning with the voice that has been calling this man. We often expect God's voice to come in some overwhelming, reverberating way, but so often it is a still, small voice. It is the quiet nudging of the Spirit, the persistent thought that will not leave him alone, the sense that there is a better way. Your prayer is asking that his ears would be opened to recognize that sound.
There is a deep hope in this. As long as that voice is tugging at his heart, hope is alive. Many try to improve their situation by their own schemes or by making grand promises to God, but the real point of victory is found in surrender. Remember the story of Jacob. He did not prevail with God by wrestling all night in his own strength or through tenacity. He prevailed when he was crippled, when he was brought to the end of himself, and began to weep and pray, finally clinging to the Lord and crying, "Bless me." The change in his character, the blessing, came through total surrender.
This is what you are asking for the owner. That he would yield his life not as a servant to his own will, but as an instrument for God's glory. God's desire for him is not harsh; it is not the voice of an arresting officer. It is the voice of a loving Father who knows that holding back only delays God's best. The condition for the fullness of God’s blessings has always been hearing and obeying His voice. We enter into the covenant of those blessings through faith in Jesus Christ, not by our own righteousness, but faith always leads to a yielded life.
Continue to ask that the Lord would quiet the noise around him. In this modern age, our minds are so glutted with information that it is difficult to tune in to the Spirit. Pray that he would find a place of quietness where he can stop fighting and simply hear the voice of his Creator. When a person stops trying to direct their own path and submits to God's voice, they find that God works out His perfect will in every circumstance. Let us ask for the work of God to be done in his life so thoroughly that he will experience afresh His love and grace, and become a testimony of His goodness. In Jesus' name, it shall be done.