In Greek, the word ‘believe’ used as a verb is translated as, ‘believe’, but as a noun, ‘believe’ is translated as ‘faith’.

Grace School of Theology

The Need to Believe, Devotional, day 4, The Glorious Grace of God. YouVersion. Bible.com

Salvation is a free gift received by placing our faith in Jesus Christ alone. John wrote that Jesus declared to Nicodemus, “whoever believes in [God’s one and only Son] shall not perish but have eternal life” (John 3:16). Today, some people have trouble accepting that belief is all it takes for someone to be saved. 

The main issue is the meaning of the word “believe.” When the Greek word is used as a verb, it is translated “believe.” When it is used as a noun, it is translated “faith.” The Gospel of John demonstrates the importance of this word with its repeated use of “believe” as a verb. It is used 98 times as a condition for salvation. The other Gospels and New Testament books use “believe” as a verb 150 times altogether. The consistent result of believing is eternal life. When one believes, one can then know that he or she has eternal life as a present possession—right now (John 5:24; 9:38).

John is careful to use figures of speech or word pictures that are passive, such as receive, drink, and eat. None of these pictures portrays or communicates the idea of merit, work, or achievement. There are no qualifying words used with believe such as, “really believe,” “truly believe,” or “genuinely believe.” There is only one kind of belief. There are no other conditions mentioned in John, such as repentance, surrender, commitment, confession, or obedience. Nor does the word “believe” intrinsically or inherently contain these concepts. All that is required to be saved is to believe—to place one’s faith in Jesus. Salvation—eternal life—is a gracious gift of God (John 1:12).

This is what a person must do to receive eternal life: Believe that Jesus, the Son of God, died for your sin, rose from the grave to defeat the power of sin and death and can give you eternal life freely, as a gift. 

Resource – The Glorious Grace of God. YouVersion. Bible.com. Contributor – Grace School of Theology.