Now these four texts can be subclassified into the type of text that they actually are. So what you see here is the subclassification of the Vedas that's often referenced, that amongst these texts, some of the verses are mantras, hymns, prayers, those are referred to as Samhitas. You have the things that are more ritual ceremonies, these are Aryanakas. And Aryanakas are also things being referred to things that you have learned or rituals to do in the forest. Maybe at the time of the, when the Vedas were written, these were things that people would go meditate and do in the forest. You have the Upanishads, which means to sit close to or sit near. And if you look at the Upanishads, it really is referring to sitting close or near a teacher.