SATI or sachch, Punjabi form of the Sanskrit satya or sat, lit. truth, in the philosophical sense is essential and ultimate reality as against inessential or partial truth. Rooted in Sanskrit as meaning "to be, live, exist, be present, to abide, dwell, stay", satya means " true, real, pure," as also the "quality of being abidingly true, real, existent." Satya or satyam is a widely used term in the philosophical thought of India. It signifies eternality, continuity and unicity. In the Upanisads sat (truth) is the first of the three essential characteristics of Brahman, the other two being chit (intelligence) and anand (bliss). In Vedanta philosophy, the one permanent reality, Brahman, is called Sat, while the phenomenal fluxional world is named asat (nonreal).
BABAR VANI (Babar\'s command or sway) is how the four hymns by Guru Nanak alluding to the invasions by Babar (1483-1530), the first Mughal emperor of India, are collectively known in Sikh literature. The name is derived from the use of the term in one of these hymns: "Babarvani phiri gai kuiru na rod khai Babar\'s command or sway has spread; even the princes go without food" (GG, 417). Three of these hymns are in Asa measure at pages 360 and 41718 of the standard recension of Guru Granth Sahib and the fourth is in Tilang measure on pages 72223. Zahir-ud-Din Muhammad Babar, driven out of his ancestral principality of Farghana in Central Asia, occupied Kabul in 1504.
SORATHI KI VAR, or Ragu Sorathi Var Mahale Chauthe KI as is the full title recorded at the head of the text in the Guru Granth Sahib contrasting the short title in the index, is one of the eight vars composed by Guru Ram Das. It comprises twenty-nine pauns, i.e. stanzas of five verses each, interspersed with fifty-eight slokas three of them being by Guru Nanak, one by Guru Angad, forty-seven by Guru Amar Das and seven by Guru Ram Das, the author of the Var. The Var opens with Guru Nanak`s line: "sorathi sada suhavani je sacha mani hoi agreeable always (to sing) is Raga Sorathi provided one`s mind is to truth attuned" (GG, 642).