The phrase 'the Son' in the Holy Bible means Christ only. The Lord Jesus Christ says of Himself" Therefore if the Son makes you free, you shall be free indeed' (Jn. 8:36). He said these words in preaching that He came to free them from their sins.
St. John the Evangelist said: "He who has the Son has life, he who does not have the Son of God does not have life" (1 Jn. 5:12). Thus he used in one verse the two terms: 'the Son' and 'the Son of God' to refer to One Person. He also said: "And we have seen and testify that the Father has sent the Son as Savior of the world' (1 Jn. 4:14). The term 'the Son' on its own means Christ. The Lord Jesus Christ talked about Himself as the Son and as the Son of God.