阿彌陀經疏 1.77

1.77

又有問者：「此之五句皆為證是佛所說令人信受，何但如是兩字獨名為信？」

There is also a questioner who asks: "These five phrases all serve to verify that it is spoken by the Buddha and cause people to accept it with faith; why are the two words 'Thus' alone specifically designated as faith?"