Beyond mishap

What is the meaning of "beyond mishap" in the following promise: "It is yours beyond mishap"?

No matter what happens?
Unless something bad happens (and then it won't be yours)?

Thank you!

Here is a passage from what I could gather by Googling.

"See, Jan, the ship is yours beyond mishap; the mill goes free; your
father may hold up his head again. And all I ask, Jan, is that you
drink to me, willing the while that your soul may go from you and
become the soul of old Nicholas Snyders--for a little while, Jan, only
for a little while."

From what I can gather, it means irrespective to circumstances, the fate or outcome does not meander.