As in other chapters of the Upanishad, several of these verses are also found in more ancient texts; for example, verse 4.3 of the Shvetashvatara Upanishad is identical to hymn 10.8.27 of Atharva Veda. The verses are notable for their grammar, where through numerous poetic phrases, the gender of the highest Self (God), is meticulously and metrically stated as neuter gender, as against the occasional masculine gender that is found in some ancient texts. The Upanishad states that Brahman is in all Vedic deities, in all women, in all men, in all boys, in all girls, in every old man tottering on a stick, in every bee and bird, in all seasons and all seas. Out of the highest Self, comes the hymns, the Vedic teachings, the past and the future, asserts the Shvetashvatara Upanishad. The fourth chapter of the Shvetashvatara Upanishad contains the famous metaphorical verse 4.5, that was oft-cited and debated by the scholars of dualistic Samkhya, monist Vedanta and theistic Vedanta schools of Hinduism in ancient and medieval era, for example in Vedanta Sutra's section 1.4.8. The metaphor-filled verse is as follows, The metaphor of three colors has been interpreted as the three Gunas, with red symbolizing harmonious purity (Sattva), white as confused passion (Rajas), and black as destructive darkness (Tamas). An alternative interpretation of the three colors is based on an equivalent phrase in chapter 6.2 of Chandogya Upanishad, where the three colors are interpreted to be "fire, water and food". The unborn being with feminine gender is symbolically the Prakrti (nature, matter), while the two masculine beings are Cosmic Self and the Individual Self, the former experiencing delight and staying with Prakrti always, the latter leaves after experiencing the delight of Prakrti. All three are stated in the verse to be "unborn", implying that all three are eternal. The Samkhya school of Hinduism cites this verse for Vedic support of their dualistic doctrine. The Vedanta school, in contrast, cites the same verse but points to the context of the chapter which has already declared that everything, including the feminine (Prakrti) and masculine (Purusha), the individual Self and the cosmic Self, is nothing but Oneness and of a single Brahman. The verses 4.9 and 4.10 of Shvetashvatara Upanishad state the Māyā doctrine found in many schools of Hinduism. The text asserts that the Prakrti (empirical nature) is Māyā, that the individual Self is caught up by