If you mean the "rule" that organised religion is teaching Christians how to live; you did.
If you think Christianity is simply about being saved from your sin and does not involve a way of life based on God's word written, you are sadly misinformed.
Who said anything about that?
I am talking about organised religion = "believe this doctrine", "follow these rules", "get involved in buildings/stewarding/church finances", "try to think of activities that will persuade people to come to a service/set foot in the building," etc.
Personally, I don't like any of these things; I think they are restrictive, stifling and give us the wrong focus.
Of course the way we live our lives is important. We are to be salt and light in our communities. We are to be ambassadors for Christ and his witnesses.
Ambassadors for Christ is not the same as ambassadors for a particular denomination, church community or set of rules.
Jesus told the Pharisees exactly what he thought of their insisting on obedience to the detailed points of the law. He criticised them for putting heavy burdens on to others. He called them hypocrites because they would pull an animal out of a ditch on the Sabbath, but they criticised Jesus for saying "stretch out your hand" and healing on the Sabbath. He said that they measured out 1/10 of all their herbs so that they did not break the law on tithing, but they neglected all the laws about showing mercy or forgiveness.
The word "relationship" is not in my Bible.
Neither is the word "computer", but you're using one.
God has many names - Lord, King, Creator, All-knowing, All mighty etc. Jesus taught that we can call him "Abba"; an informal name best translated as "daddy". What is that, if not relationship?
Before Jesus, people went to prophets to ask for a "word from the Lord". Jesus taught that we can pray in the privacy of our own rooms.
The rule was that if 10 men were present there could be a synagogue, to worship and read the Scriptures. Jesus said "where 2 or 3 are gathered ..."
Both those things speak of an intimacy with God. How can someone be intimate without having, or being in, a relationship?
In the OT, the Spirit came upon certain people - prophets or kings - for a certain purpose and a specified time. Since Pentecost, the Holy Spirit can come and live in all believers. Indeed, we are encouraged to keep on being filled with the Spirit. God himself living IN us; what is that, if not relationship?
While the goal is not to remain a babe in the faith.
So what provision have the apostles made for that?
The Apostles tell us to be true to the faith, hold onto what we were taught and first believed, study the Scriptures, have fellowship with other Christians (which involves more than socialising or talking about families) and live our lives for him.
I don't deny that some, maybe most, Christians find that a helpful way of doing that is to belong to a church, follow a liturgy, lectionary readings and so on. Anything which helps someone to express their faith and to grow in their relationship with Christ is fine. Even structure and church rules - if they help people - are good.
As long as the liturgy, rules and so on, are a guide and not the master.