The single-mindedness referred to in The Commentaries on the Amitabha Sutra refers to single-mindedness in practice and understanding. Nevertheless, there is also the single-mindedness of ordinary people. This refers to your utmost sincerity and sense of remorse. When you break the precepts, you repent, and with a sense of remorse, bring forth utmost sincerity to chant the Buddha’s name. If you can do that, you will definitely be reborn in the Western Pure Land.