It's all suchness! What is "suchness"?

Dhr. Seven, Pat Macpherson (eds.), Wisdom Quarterly Wiki edit

Tathātā (Sanskrit tathātā, Pali tathatā, Tibetan དེ་བཞིན་ཉིད་, Chinese 真如) is variously translated as "thusness" or "suchness," literally "similar to that." To what? Exactly! That's what we asked an enlightened teacher. It's similar, for example, to the Great Earth, in that it calmly accepts all things, and similar to water, in that it flows like the Tao... It is our True Nature (sometimes confoundingly called our "Buddha Nature" or tathāgatagarbha). It is a central concept in Mahayana Buddhism having a particular significance in Chan Buddhism as well. The synonym dharmatā ("thingness") is also used. In his day the Buddha referred to himself as the Tathāgata, which can mean either "One who has thus come" or "One who has thus gone" (also "Welcome One," "Well Gone One," or "Wayfarer") and may be interpreted as actually meaning "One who has arrived at suchness." More