Belief in Jesus is also not a great answer as it means different things to different people. SO if you can unpack what belief in Jesus means practically for the christian.
Believe in Jesus means : believe that Salvation/ Living peacefully with God is only by God’s Grace, or men will never be able to achieve their salvation by their own works what ever those sound good ( Isa 64:6 )( likened such who works on Sabbath day should be punished to dead ).
Believe in Jesus means : The cross event ( death and resurrection ) actually was manifestation of God’s Grace , He acted as : sacrifice lamb , the holly priest , the one who is sanctified .
This role can be described as:
In OT have already said that man is sanctified by sprinkling the blood of the sacrifice lamb were done by the priest = being saved = resurrecting from dead ,
these were the tasks that the messiah should demonstrate in order men could understand that
their salvation is only by God’s Grace .
We sum them as :” Men ,You will never save your self or others what ever effort you may try, because the salvation is only by God’s grace (Eph2:8) , that is what I want to demonstrate to you, I will be killed and three days later I shall resurrect from dead that you may know : the sacrifice blood is my blood = God blood , the priest is me as manifestation of God, the man who is sanctified will be acted by Me that shows you if the salvation is only for the chosen ( not man who says want , but only he or she whom the heart is made to want /written in the book of life before the creation of the world) , then by this event comes to pass you will understand that the salvation is only by God’s Grace, and you that believe (
believe if this event is really manifestation of God’s grace ) is
the winner you shall be resurrected too in the last day, and you that don’t believe you are the loser because you will surely say that I am not God Him self , and consider Me as a created being as you are , then if I am a created being surely I am spiritually dead too as you are ,then I shall reach My salvation too by this event( by this event I shall pay my own sins) means this event surely not a manifestation of God’s Grace or there is no premise
“salvation is only by God’s Grace “ and every one shall pay their sins by their own effort , then why can’t you fulfill the Torah laws? , why am I said savior? (Luk2:11), why am I said Redeemer? (Eph1:7), you that don’t believe you are really a loser certainly you are walking to the lof “.
Isa43:3
For I am the LORD thy God, the Holy One of Israel,
thy Saviour: I gave Egypt for thy ransom, Ethiopia and Seba for thee
Isa43:11 I, even I, am the LORD;
and beside me there is no savior
Isa47:4
As for our redeemer, the LORD of hosts is his name, the Holy One of Israel
Isa63:16
Doubtless thou art our father, though Abraham be ignorant of us, and Israel acknowledge us not: thou,
O LORD, art our father,
our redeemer; thy name is from everlasting.
Rev1:5 And from Jesus Christ, who is the faithful witness, and the first begotten of the dead, and the prince of the kings of the earth. Unto him that loved us,
and washed us from our sins in his own blood
Rev5:9 And they sung a new song, saying, Thou art worthy to take the book, and to open the seals thereof:
for thou wast slain, and
hast redeemed us to God by thy blood out of
every kindred, and tongue, and people, and nation
Luk2:11 For unto you
is born this day in the city of David a Saviour, which is Christ the Lord
Eph1:7
In whom we have redemption through his blood, the forgiveness of sins, according to
the riches of his grace;
Hence by
His demonstration from that day men began to know that the salvation is only by God Grace by this understanding means men can bring glory to God