The "filling" of the Spirit is a repeated event in a believer's life that is a renewed outpouring and expansion of the Spirit's presence. This most often happens through seeking God through the means of grace (Prayer, Scripture, Fellowship, etc...), however, it can also happen spontaneously through the sovereign decision of God, and to differing degrees. In my own experience and per the testimony of Scripture (see passage above, and also Romans 8), believers experience a tangible presence of God in the room and in their hearts, a simultaneous conviction of sin and assurance of Gospel promises, and boldness and motivation for future holiness and ministry.
"Wait" you say, "That's just about everything I feel like I have been needing lately!" You're right. The Spirit delivers to you all the riches of salvation won in Christ. His presence and power are exactly what you need to live the Christian life in joy! You need to pray and ask God to fill you afresh with the Holy Spirit, even now. You need to seek until you find. You must be willing to sacrifice time and affection in order to make pursuing the King of Kings the highest thing in your life. Everything good and bad will be put in its place as a result of this and you will live a well-ordered life, and your loves will be placed in the right place and in the right order. It is simply AMAZING, dear friends, what kind of things God can restore and heal when He comes back into your life in a powerful way like this. The filling of the Spirit is something that you should make the priority of each day though hungering and thirsting prayer!
In Prayer Today:
Ask God to fill you with the Holy Spirit.