The second link in the chain of becoming a Christian is to Believe, having Faith In Christ:

Hebrews 11:1,6 1Now
faith is being sure of what we hope for and certain of what we do not see.
6And without faith it is impossible to please God, because anyone
who comes to him must believe that he exists and that he rewards those who
earnestly seek him.
John 3:16 16"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.
John 8:24 Jesus says 24I told you that you would die in your sins; if you do not believe that I am the one I claim to be, you will indeed die in your sins.
Acts 8:26-38 26But an angel of the
Lord spoke to Philip saying, "Get up and go south to the road that descends
from Jerusalem to Gaza." (This is a desert road.)
27So he got up and went; and there was an Ethiopian eunuch, a court
official of Candace, queen of the Ethiopians, who was in charge of all her
treasure; and he had come to Jerusalem to worship, 28and he was
returning and sitting in his chariot, and was reading the prophet Isaiah.
29Then the Spirit said to Philip, "Go up and join this
chariot."
30Philip ran up and heard him reading Isaiah the prophet, and said,
"Do you understand what you are reading?"
31And he said, "Well, how could I, unless someone guides
me?" And he invited Philip to come up and sit with him.
32Now the passage of Scripture which he was reading was this:
"HE WAS LED AS A SHEEP TO
SLAUGHTER;
AND AS A LAMB BEFORE
ITS SHEARER IS SILENT,
SO HE DOES NOT OPEN
HIS MOUTH.
33
"IN HUMILIATION HIS JUDGMENT WAS
TAKEN AWAY;
WHO WILL RELATE HIS
GENERATION?
FOR HIS LIFE IS REMOVED
FROM THE EARTH."
34The eunuch answered Philip and said, "Please tell me, of whom
does the prophet say this? Of himself or of someone else?"
35Then Philip opened his mouth, and beginning from this Scripture he
preached Jesus to him.
36As they went along the road they came to some water; and the eunuch
said, "Look! Water! What prevents me from being baptized?"
37[ And Philip said, "If you believe with all your heart, you
may." And he answered and said, "I believe that Jesus Christ is the
Son of God."]
38And he ordered the chariot to stop; and they both went down into
the water, Philip as well as the eunuch, and he baptized him.
Acts 16:30-31 30He then brought them
out and asked, "Sirs, what must I do to be saved?"
31They replied, "Believe in the Lord Jesus, and you will be
saved--you and your household."
Ephesians 2:8 8For it is by grace you have been saved, through faith--and this not from yourselves, it is the gift of God--
Romans 5:1-2 1Therefore, since we have been justified through faith, we have peace with God through our Lord Jesus Christ, 2through whom we have gained access by faith into this grace in which we now stand. And we rejoice in the hope of the glory of God.