Not praying for one another is a sin. We ought to love one another and pray for all.
1 Samuel 12:23
23 Moreover, as for me, far be it from me that I should sin against the LORD in ceasing to pray for you; but I will teach you the good and the right way.
When we pray for one another we release grace over our lives to access the spirit realm.
Colossians 2:5 For though I am absent in the flesh, yet I am with you in spirit, rejoicing to see your good order and the steadfastness of your faith in Christ.
Apostle Paul goes beyond speaking of the "essence" of him being with the body of Christ in spirit he rather gives them the idea of his literal spiritual location.
1 Corinthians 5:1-5
5 It is reported commonly that there is fornication among you, and such fornication as is not so much as named among the Gentiles, that one should have his father's wife.
2 And ye are puffed up, and have not rather mourned, that he that hath done this deed might be taken away from among you.
3 For I verily, as absent in body, but present in spirit, have judged already, as though I were present, concerning him that hath so done this deed,
4 In the name of our Lord Jesus Christ, when ye are gathered together, and my spirit, with the power of our Lord Jesus Christ,
5 To deliver such an one unto Satan for the destruction of the flesh, that the spirit may be saved in the day of the Lord Jesus.
We see a shift in spiritual location to the extent that the prophet knows all that has happened. Every detail was given to his spirit to know that he may discern the situation in its entirety. Although the servant tried to hide his lie the prophet's spirit knew the truth. We obtain this high level through beginning a life of intercession.
2 Kings 5:26 Then he said to him, “Did not my heart go with you when the man turned back from his chariot to meet you? Is it time to receive money and to receive clothing, olive groves and vineyards, sheep and oxen, male and female servants?
Elisha was a person who stood in the gap for Israel and therefore God used his inner spirit to see information and specific detail to hold nations accountable for their actions. In this scripture, we behold a power so great that only God can receive glory. Elisha's spirit was made powerful by God and has given him the divine ability to see deep into difficult circumstances such as avoiding war for an entire nation. It's time for us to pray for one another so we too can move in this dimension.
2 Kings 6:11-12
11 Therefore the heart of the king of Syria was greatly troubled by this thing; and he called his servants and said to them, “Will you not show me which of us is for the king of Israel?”
12 And one of his servants said, “None, my lord, O king; but Elisha, the prophet who is in Israel, tells the king of Israel the words that you speak in your bedroom.”
It was constant intercession that brought freedom to Apostle Peter. We too are called to intercede!
Acts 12:5-11
5 Peter was therefore kept in prison, but constant prayer was offered to God for him by the church. 6 And when Herod was about to bring him out, that night Peter was sleeping, bound with two chains between two soldiers; and the guards before the door were keeping the prison. 7 Now behold, an angel of the Lord stood by him, and a light shone in the prison; and he struck Peter on the side and raised him up, saying, “Arise quickly!” And his chains fell off his hands. 8 Then the angel said to him, “Gird yourself and tie on your sandals”; and so he did. And he said to him, “Put on your garment and follow me.” 9 So he went out and followed him, and did not know that what was done by the angel was real, but thought he was seeing a vision. 10 When they were past the first and the second guard posts, they came to the iron gate that leads to the city, which opened to them of its own accord; and they went out and went down one street, and immediately the angel departed from him.
11 And when Peter had come to himself, he said, “Now I know for certain that the Lord has sent His angel, and has delivered me from the hand of Herod and from all the expectation of the Jewish people.”
When Jesus was still on the earth he also took the time to move into the spirit of intercession.
John 17:15
15 I do not pray that You should take them out of the world, but that You should keep them from the evil one.
When Jesus ascends to heaven he wasted no time getting into his favorite thing to do. Intercession.
Romans 8:34
34 Who is he who condemns? It is Christ who died, and furthermore is also risen, who is even at the right hand of God, who also makes intercession for us.
The Holy Spirit is also in the ministry of intercession because he wants to help us where we aren't so strong.
Romans 8:26-27
26 Likewise the Spirit also helps in our weaknesses. For we do not know what we should pray for as we ought, but the Spirit Himself makes intercession for us with groanings which cannot be uttered. 27 Now He who searches the hearts knows what the mind of the Spirit is, because He makes intercession for the saints according to the will of God."