Charles Spurgeon testified that the Holy Spirit is in all believers. He said, "Where the Holy Spirit dwells within a living child of God, He later rises out of the very midst of him as a fountain or a river, so that others may come and participate in the Spirit's gracious influences."
Spurgeon made it clear that the Holy Spirit is in all believers to flow out of us for the benefit and ministry to others. He quoted John 7:38. Jesus said, He who believes in me, as the scripture hath said, out of his heart will flow rivers of living water. The Holy Spirit indwells us and flows out of us. He indwells believers to bless us. God's Spirit flows out of believers to bless others.
Spurgeon was gifted as a pastor-evangelist. He knew that souls were saved through his ministry, because of the work of the Holy Spirit. All believers have at least one ministry gift of the Spirit. God wants to use us in ministry to others. As each one has received a gift, minister it to one another, as good stewards of the manifold grace of God (1 Peter 4:10).
God's Spirit flows out of believers to minister in the lives of others. The Holy Spirit both indwells us, and flows out of us for ministry to others. The Holy Spirit does the work through us, even out of us, flowing as rivers of living water. Give all the glory to God, knowing that the Holy Spirit works in you. For it is God who works in you both to will and to do for His good pleasure (Philippians 2:13).