This is actually a good topic. Every religion has their own way of salvation. Some say that only by believing in Jesus and accepting Him as your personal savior we can have eternal life. However, if we look at the Bible closely, we can see the true way to salvation and that is by keeping God's words as absolute. Let's see what the Bible testifies regarding eternal life.
John 6:53-55 [ 53 Jesus said to them, "I tell you the truth, unless you eat the flesh of the Son of Man and drink his blood, you have no life in you. 54 Whoever eats my flesh and drinks my blood has eternal life, and I will raise him up at the last day. 55 For my flesh is real food and my blood is real drink. 56 Whoever eats my flesh and drinks my blood remains in me, and I in him.]
Jesus clearly said that "unless you eat His flesh and drink His blood, you have no life in you". So here we can see that, from Jesus Christ Himself, that salvation is given by eating His flesh and drinking His blood and not just by believing in Him and accepting Him. Now that we know the Jesus body and blood gives eternal life, how can we receive it? In the Bible, Jesus gave us a way.
Luke 22:7-20 [ 7 Then came the day of Unleavened Bread on which the Passover lamb had to be sacrificed. 8 Jesus sent Peter and John, saying, "Go and make preparations for us to eat the Passover."
9 "Where do you want us to prepare for it?" they asked.
10 He replied, "As you enter the city, a man carrying a jar of water will meet you. Follow him to the house that he enters, 11 and say to the owner of the house, 'The Teacher asks: Where is the guest room, where I may eat the Passover with my disciples?' 12 He will show you a large upper room, all furnished. Make preparations there."
13 They left and found things just as Jesus had told them. So they prepared the Passover.
14 When the hour came, Jesus and his apostles reclined at the table. 15 And he said to them, "I have eagerly desired to eat this Passover with you before I suffer. 16 For I tell you, I will not eat it again until it finds fulfillment in the kingdom of God."
17 After taking the cup, he gave thanks and said, "Take this and divide it among you. 18 For I tell you I will not drink again of the fruit of the vine until the kingdom of God comes."
19 And he took bread, gave thanks and broke it, and gave it to them, saying, "This is my body given for you; DO THIS IN REMEMBRANCE OF ME."
20 In the same way, after the supper he took the cup, saying, "This cup is the new covenant in my blood, which is poured out for you.]
There you go the Passover of the new covenant gives eternal life. Some people say that Passover is only for Jewish but here we can clearly see that Jesus set us the example on how to have eternal life. Jesus didn't keep the Passover of the old covenant where they would slaughter a lamb and eat it on it's appointed time. It was Jesus Passover of the new covenant, the bread and wine which gives eternal life. Only by keeping Jesus words absolutely and not insisting our own fixed idea we can have eternal life. God bless you all.