burn one’s ships

[Gość: lelum]

resign from further action? (James, A turn of the screw... p.265)

[Gość: Steve]

burn your boats or burn your bridges: remove any possibility of returning or
retreating, usually in terms of committing yourself to a point of view so
strongly that you cannot get out of it without admitting that you are wrong, or
even having to apologise for your mistake. It is normally used when the
commentator (which could be yourself) is not completely sure that what you say
is right even if the argument makes sense.

I should point out that you will note in this answer that the English do not
normally say 'one', but replace it by 'you'. I taught myself to say 'one'
because it is more logical, but I found that I was the only person who did so
and am now trying to go back to more normal English.