If “ψευδονται” is a true middle rather than passive, it could have a reflective import, i.e. it could mean “they lie to themselves”, i.e. “they will deceive themselves” or “they will be self-deceived.”
If “ψευδονται” is a true middle rather than passive, it could have a reflective import, i.e. it could mean “they lie to themselves”, i.e. “they will deceive themselves” or “they will be self-deceived.”