It's not enough to be skilled with words or know the Bible. It takes the anointing of the Holy Spirit to press the truths of God into men's hearts.
Ask God to take the words of the preacher and make them real as only He can. When God speaks, things are created, hearts are changed.
Lu 4:18 The Spirit of the Lord is on me, because he has anointed me to preach good news to the poor.
Lord, You have the name that is above all names. You are Lord forever and there is no one who can challenge Your authority and power. You rule for ever and ever, and there is no end to Your Kingdom.
Lord, anoint Your servants
with wisdom and insight to reach out to the poor and needy. Enable them to put Your truth in a form that can be easily understood. Anoint their words with power to penetrate the heart. Open the ears of those who hear, and make the Good news of Your son Jesus, real to them. Lord, Your heart is near to the poor and oppressed, anoint Your servants, Your servants
, to represent you as the Lord and Savior they so desperately need.