Jesus answered, "I am the way and the truth and the life. No one comes to the Father except through me."
As we study the terms of the New Covenant in the blood of Jesus we find that the second term to which we must adhere is to come to the Father through Jesus. There is no New Covenant apart from Jesus and no way to the Father without Him.
There are three aspects to this coming to the Father through Jesus.
Jesus The Way
The early disciples were known as the followers of the Way (Acts 22:4). The most significant difference between Christianity and other religions is that Christianity is not a list of rules but a relationship with a person. For example, while Islam requires the following of the five pillars and Sikhism has the 5 k's, Christians are simply required to follow Jesus and to come to God through Him.
On the day of Pentecost, when Peter preached his sermon, 3,000 people responded to his call:
“Repent and be baptized, every one of you, in the name of Jesus Christ for the forgiveness of your sins. And you will receive the gift of the Holy Spirit. The promise is for you and your children and for all who are far off—for all whom the Lord our God will call.” (Acts 2:38-39)
Because the Lord Jesus went to the cross to pay the price for our sin we can follow Him through His death in baptsim and rise again with Him to eternal life (Rom 6:1-4).
Jesus The Truth
Pilate famously asked, "what is truth?" (Jn 18:38). This seems to be the question of our age. Most people behave, even if they would not admit it, as though there are no moral absolutes. Even for Christians decisions are often made on the basis of whether we can get away with it rather than on white is right and what is true.
But if Jesus is the way and the truth, then truth is required to enter in to eternity. Primarily this is admitting the truth about our sinful nature. Our sin needs to be confessed and repented of.
If we confess our sins, he is faithful and just and will forgive us our sins and purify us from all unrighteousness. (1 Jn 1:9)
Jesus The Life
For God so loved the world that he gave his one and only Son, that whoever believes in him shall not perish but have eternal life. (Jn 3:16)
Now this is eternal life: that they may know you, the only true God, and Jesus Christ, whom you have sent. (Jn 17:3)
It really is very simple. There is no eternal life outside of Jesus. The New Covenant is only for those who come through Christ.