This is what one of those thick West Marine dock lines look like from the inside.
If you want to cut a line, we recommend weathering a gale on a mooring buoy. The weather mitigated not too long after this happened and we have had a very mild last 24 hours.
These are lines that came with the boat and were close to being retired after weathering 3 years of the storms that beat us at Port of Sidney marina. We had 4 with 2 with some substantial chafe points. We put leather chafe guards and set the lines in a shortened way so that the chafed bits weren't load bearing...but I think now we are ready to buy some new ones.