Thirsting Souls Bible Teaching

(Heb 5:9) “And being made perfect, He became the author of eternal salvation unto all them that obey Him;”   Notice, the salvation is eternal, never ending. How is it then that there are those who use this Book to teach the loss of salvation? That which can be lost it not eternal. I praise God His Word is always true while those of men, even those who are well-meaning, cannot be trusted.