Sufferable

Prudence, indeed, will dictate that Governments long established should not be changed for light and transient causes; and accordingly all experience hath shewn, that mankind are more disposed to suffer, while evils are sufferable, than to right themselves by abolishing the forms to which they are accustomed.

Greek philosophers put it bluntly: "The best thing in the world is not to be born; but the second best is to die." Up to the point of suicide the suffering continues to be sufferable.