大乘起信論義記 2.34

2.34

是故一切法從本已來，離言說相、離名字相、離心緣相，畢竟平等、無有變異、不可破壞，唯是一心，故名真如。

"Therefore, all phenomena from the beginning have been free from the marks of verbal expression, free from the marks of designations, and free from the marks of mental conditioning; they are ultimately equal, without variation, and indestructible. They are only the One Mind, and are therefore called tathatā."