God himself is the only One who can save man, and salvation [1] can only be a gift of His grace. Such is the gospel consistently preached from Genesis to Revelation. Consider the following:
I, even I, am the Lord; and beside me there is no saviour. (Isaiah:43:11I, even I, am the LORD; and beside me there is no saviour.
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For unto us a child [the Messiah] is born…[He is] the mighty God, the everlasting Father. (Isaiah:9:6For unto us a child is born, unto us a son is given: and the government shall be upon his shoulder: and his name shall be called Wonderful, Counsellor, The mighty God, The everlasting Father, The Prince of Peace.
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Thou shalt call his name Jesus: for he shall save his people from their sins. (Matthew:1:21And she shall bring forth a son, and thou shalt call his name JESUS: for he shall save his people from their sins.
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They that are in the flesh cannot please God. (Romans:8:8So then they that are in the flesh cannot please God.
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For y grace are ye saved…not of works, lest any man should boast. (Ephesians:2:8-9 [8] For by grace are ye saved through faith; and that not of yourselves: it is the gift of God:
[9] Not of works, lest any man should boast.
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Not by works of righteousness which we have done, but according to his mercy he saved us. (Titus:3:5Not by works of righteousness which we have done, but according to his mercy he saved us, by the washing of regeneration, and renewing of the Holy Ghost;
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Being justified freely by his grace through the redemption that is in Christ Jesus. (Romans:3:24Being justified freely by his grace through the redemption that is in Christ Jesus:
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And if by grace, then is it no more of works: otherwise grace is no more grace. But if it be of works, then is it no more grace: otherwise work is no more work. (Romans:11:6And if by grace, then is it no more of works: otherwise grace is no more grace. But if it be of works, then is it no more grace: otherwise work is no more work.
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Links:
[1] https://www.thebereancall.org/taxonomy/term/57/salvation
[2] https://www.thebereancall.org/bible/1/ISA/43/11#v11
[3] https://www.thebereancall.org/bible/1/ISA/9/6#v6
[4] https://www.thebereancall.org/bible/1/MAT/1/21#v21
[5] https://www.thebereancall.org/bible/1/ROM/8/8#v8
[6] https://www.thebereancall.org/bible/1/EPH/2/8-9#v8
[7] https://www.thebereancall.org/bible/1/TIT/3/5#v5
[8] https://www.thebereancall.org/bible/1/ROM/3/24#v24
[9] https://www.thebereancall.org/bible/1/ROM/11/6#v6