The Bible speaks of truth as coming from God.  God is truth.  He alone is perfectly stable, solid, and firm.  He is unchangeable, the standard by which all things are measured.  Thus, we read of God as “the God of truth,” and Jesus says, “I am the truth” and He calls the Holy Spirit, “the Spirit of Truth.”

To rightly understand truth, one must rightly understand God, in whom truth consists, and to rightly understand God, one must know and trust the Lord Jesus, who said He came to earth, for the very purpose of bearing witness of the truth (John 18:37).

How do we test claims of truth in general?  There is a certain kind of truth that we test through observation, experimentation, eyewitness, examination, and scientific evidence. As far as the history of Jesus and other accounts of Scripture are concerned, we use those means by which historical evidence can be tested—through archaeology, for example.  Many of the historical claims of Scripture can be established by the common standards of historiography.

Second, we want to test the claims of truth through the test of rationality.  Is it logically consistent?  We examine the content of Scripture to see if it is coherent.  One of the most astonishing things is that the Bible has literally thousands of testable historical prophecies, cases in which events were clearly foretold, and both the foretelling and the fulfillment are a matter of historical record. The very dimension of the sheer fulfillment of prophecy of the Old Testament Scriptures should be enough to convince anyone that we are dealing with a supernatural piece of literature.

And yet  we know from Scripture is that what is required for one to believe in the Bible as God’s word and as true is the internal testimony of God the Holy Spirit (1Corinthians 2:14).    When the Holy Spirit opens one’s eyes to the truth of Scripture, He is not giving them special information that is not available to others, but He changes the heart and disposition to the evidence that is already there, so that we embrace it.

A Christian is a follower of Jesus Christ and finds his or her identity in Him.  Christians confess that they are sinners and separated from their Creator God. They have come to know that there is only one suitable savior, Jesus Christ, to rescue them from their sinful condition.  They believe that the Bible is God’s true revelation which shows them clearly the way of salvation through His Son, the Lord Jesus Christ, who came to this world, suffered, died on the cross and was resurrected to save them from the consequences of sin (eternal death) and break the power of sin in their lives.
Christians strive to love God above all and their neighbor as themselves, desiring to glorify God in their lives by keeping His commandments.  Christians know that they cannot earn their own salvation by any work of their own, but that salvation is a free gift from God alone.  Christians look with eager anticipation for the day when they shall be with Christ in heaven, either after death or when Jesus returns to earth in great glory and power  at His second coming.

In Acts 16:30 we hear the Jailor in Philippi ask this very same question when a great sense of his need came over his heart. Paul & Silas’ response was “Believe on the Lord Jesus Christ, and thou shalt be saved.”
This is the only and sure way of salvation. There is no other way of salvation than by Jesus Christ.  There is no other way of being saved through Jesus Christ than by believing in Him.  There is also no danger of coming up short when we take this way, for it is the way God has appointed and He is most faithful concerning those things which He has promised.  This is wonderfully good news; there is a way of salvation!