In most religion, there is a path or steps that is recommended to gain salvation. This may involve religious rituals, prayers, or declarations. In the Heaven’s Truth Church (Tenrikyo), it is recommended that we first understand causality in order to understand God’s teachings. The metaphors narrow and broad are used in describing two separate paths.
In the Osashizu, it is stated that the narrow path is difficult to follow, but there are less injuries. A Broad path (path of the world) is easy to follow but there are more injuries.
The narrow path is a path that is aware of causality. It is a difficult path because it requires patience and resolve in going through the consequences of causality. But because one is aware of the cause of causality, one is able to confront causality with reflection and true sincerity. One begins to remove greed and arrogance bringing forth less sufferings (injuries) in the future. This path guarantees joy in the future.
The worldly path is not aware of causality. It is an easy path because it does not require patience and resolve in dealing with the consequences of causality. When sufferings or inconveniences occur, one is at loss. In coping with the consequences of causality, one easily lets greed and arrogance take over the mind. This will bring forth more sufferings (injuries) in the future. This is the path of the world now. When the narrow path becomes the path of the world, the world will experience everlasting joy.