Of all the four volumes of sermons by George Whitefield, Vol. 1 is based on the foundations of faith. In sermons 6 and 23,  it convinces man that all will come to death in solemn funeral sermons. He pleads with mankind to come to the Lord before that time. In sermons 11, 12, and 13, George addresses the gospel to believers, encouraging them in their salvation. In sermons 3 and 21, he states that there need to be afflictions, and that there is comfort and patience through the trials.  
 
Sermons 9 and 10 on the work of the Holy Spirit; its indwelling is to transform you as a new person. He speaks of being a nominal Christian only without truly being converted. All these sermons glorify the work of Jesus Christ.
 
You are one of those who don't want to fall into unbiblical mistakes and heresy. Whitefield's sermons 26 and 27 in this volume address these.
 
Often, Whitefield's style is plainly written. With sequential, easily understood wording as he addresses each point.  Each step includes an explanation to help move the Spirit in your heart.
 
Here's a brief description of what's in each sermon:
The Kingdom of God, Understand how God's kingdom operates now—learn what it means to live under divine rule today, not just wait for a future heaven.
The beloved of God, Anchor your identity in God's unchanging love—stop questioning whether you're truly accepted and rest in His beloved status as saved sinners.
Glorifying God in the fire; or, the right improvement of affliction. Your suffering has meaning because God must glorify his son; his trials are meant to glorify God and purify you.  
God—A Believer's Glory, Shift your eyes from self; achievements, possessions, or reputation must be laid down. God must be glorified, and you'll learn that satisfaction will be in Him.
The power of Christ's Resurrection: Enter the power of the resurrection daily, for the force that raised Christ from the dead works in you now, the spiritual victory.
Christ, The Believer's Refuge—A Funeral Sermon: If you face death either for yourself or a loved one, you needn't have terror—discover Christ as the haven where believers find eternal security.
The Lord Our Light: When you can't see your way forward, let Christ illuminate your way.
Neglect of Christ the Killing Sin: Ignoring Christ creates spiritual apathy and is more deadly than sins.
The Holy Spirit, Convincing the World of Sin, Righteousness, and Judgement: Understand the difference between spirit-wrought work and mere guilt or emotional manipulation.
The Indwelling of the Spirit—Common Privilege of All Believers: You can claim your birthright as a believer because God isn't a respecter of persons.
Repentance and Conversion: Know the difference between worldly regret and true repentance—learn what genuine conversion looks like versus false profession. 
Saul's Conversion: Find out how God transforms His enemies into His ambassadors—even if your past was marked by religious persecution or moral failure.
The Conversion of Zacchaeus: Discover that social outcasts and despised sinners are within Christ's reach—no one is too corrupt or rejected for saving grace. 
The Almost Christian:  Escape the trap of close enough religion, all will be plain on Judgement day—identify and reject the halfway Christianity that deceives millions into false security.
Self-Inquiry Concerning the Work of God: Examining your heart with the Bible is your duty. You should use scriptural tests to verify whether God's work is genuinely happening in you.
Soul Prosperity: Measure success by the right standard—learn what true spiritual prosperity looks like versus worldly definitions of thriving.
Soul Dejection: Find biblical help for spiritual depression—understand why believers experience dark seasons and how to persevere through them.
The Eternity of Hell Torments: Grasp the urgency of the gospel—eternal consequences make evangelism and personal holiness matters of life and death.
All Men's Place: Understand universal human accountability—every person has an appointed place in eternity based on their response to Christ.
Persecution—Every Christian's Lot: Prepare for opposition and suffering—normalize persecution as the expected experience of genuine believers, not an exception.
The Furnace of Affliction:  See God's refining purpose in your trials—affliction isn't random cruelty but divine metallurgy purifying precious metal.
Abraham's Offering Up His Son Isaac: Learn radical obedience through biblical example—discover how faith trusts God even when His commands seem to contradict His promises.
The Gospel, A Dying Saint's Triumph—A Funeral Sermon: Watch the gospel validate itself at life's end—see how Christian hope transforms death from defeat into victory.
Spiritual Baptism: Understand Spirit baptism beyond ritual—grasp the internal reality that water symbolizes externally.
The Burning Bush: Recognize God's presence in unexpected places—learn to see divine glory in ordinary circumstances and hear His call.
The Pharisee and the Publican: Escape self-righteousness or despair—find the narrow path between prideful religion and hopeless self-condemnation.
The Wise and Foolish Virgins: Cultivate genuine readiness for Christ's return—distinguish true preparedness from mere external profession.
The Great Duty of Family Religion: Establish leadership in your home—learn how to make your household a center of worship and discipleship.
The Duty of a Gospel Minister: Understand pastoral accountability—whether you're a minister or church member,  know what faithful ministry requires.
Jacob's Ladder—A Farewell Sermon: See Christ as the bridge between heaven and earth—understand how the divine-human connection works through Him alone.
A Faithful Minister's Parting Blessing—A Farewell Sermon: Receive Whitefield's final priorities and benediction—hear what matters most from a dying pastor's heart to his flock.