I would proffer the observation there can be no free will within the dominion of Omniscience. Nor can there be when sacred texts outline, per those writings being said to be authored by god, rules of conduct and punishment for non-compliance to said rules.
Therefore, I believe what salvation defines is that one is seeking to be saved from god. That creator of heaven and hell who applied the curse of sin upon the first born of his creation that Omniscience would know would come short of it's glory and expectations in the garden. Thus, to seek to be saved is to seek to be saved from the god that made one a born sinner and being Omniscient and Omnipresent can not be Omnibenevolent when it is also the Omnigenetic (creator) of hell.
To Adams sin being passed down.
As to sacred texts, nothing hase been named sacred that was not named so by man.
Ezekiel 18:20 The soul that sinneth, it shall die. The son shall not bear the iniquity of the father, neither shall the father bear the iniquity of the son: the righteousness of the righteous shall be upon him, and the wickedness of the wicked shall be upon him.