The text leads me to speak to you that are saints as well as to you that are open and unconverted sinners. I need not tell you, that walking with God is not only honourable but pleasant and profitable also. For ye know it by happy experience and will find it more and more so every day. Only give me leave to stir up your pure minds by way of remembrance and to beseech you by the mercies of God in Christ Jesus, to take heed to yourselves and walk closer with your God than you have in days past. For the nearer you walk with God, the more you will enjoy of him whose presence is life and be the better prepared for being placed at his right hand, where are pleasures forevermore. O do not follow Jesus afar off! O be not so formal, so dead and stupid in your attendance on holy ordinances! Do not so shamefully forsake the assembling yourselves together, or be so [scanty] or indifferent about the things of God. Remember what Jesus says of the church of Laodicea, ‘Because thou art neither hot nor cold, I will spew thee out of my mouth.’ Think of the love of Jesus and let that love constrain you to keep near unto him. And though you die for him, do not deny him, do not keep at a distance from him in any way.
The Sermons of George Whitefield (Wheaton, IL; Crossway Books; 2012) Sermon 2: Walking With God.