"...out of his heart will flow rivers of living water."
When He found someone who was sick or spiritually oppressed, Jesus released the kingdom of God upon them. They were healed, set free of demonic oppression or they were given a new perspective of their value in God's eyes. Notice how Jesus met people's needs: He released the kingdom of God upon them.
The way a dam releases water when it opens.
There is a river flowing out of the throne of God that carries His presence wherever it goes. This river of life flows into you and I, bringing God's presence, His glory and His kingdom to us. We are the dwelling place of God's presence in the earth. His purpose for giving us the Holy Spirit is to turn us into people who carry and release His presence.
Just as Jesus manifested the character, the power and the glory of God to reveal and accomplish the Father's will here on earth, we're commissioned to do the same today. He is our example. We are gateways to the kingdom of God. When we open our gates His presence flows out of us, bringing joy, peace, healing, deliverance, revelation, and other things that people need.
It's a good idea from time to time to examine how well God's presence is flowing in and out of us. The flow can be gauged by the fruit of the spirit that we produce. It can be restricted by things like bitterness, anger, fear, unbelief, and unforgiveness that act like rocks and sticks which clog up the flow. These attitudes also taint the flow with flavors that don't represent God's character. When they're removed, we receive a greater inflow of His presence and it's easier for it to flow out of us, untainted.
The life of the believer is one of being filled with God's presence and releasing it to others.