As Jesus prepares to leave His disciples, He promises that the Spirit inside them will be better than Himself beside them. The Spirit coming is to our advantage because He has been sent to fill our hearts into order to push out the realm of hell and it’s power in our lives. Hell is evicted where God’s presence moves in. Knowing we have the indwelling of His presence and power, we can pray, “Spirit of God, transform the Hell out of my heart.”
Nevertheless, I tell you the truth: it is to your advantage that I go away, for if I do not go away, the Helper will not come to you. But if I go, I will send him to you.
But what comes out of the mouth proceeds from the heart, and this defiles a person. For out of the heart come evil thoughts, murder, adultery, sexual immorality, theft, false witness, slander.
And I tell you, you are Peter, and on this rock I will build my church, and the gates of hell shall not prevail against it.
Additional passages: James 3:6, Ezekiel 36:26-27