"Looking back as far as we can see, in the Rig Veda we find Earth and Heaven often addressed in union as a single being (dyáváprithiví) and honoured together; they are ‘parents of the gods’ (7.53), ‘father and mother’ but also the ‘twins’ (1.159); together they ‘keep all creatures safe’ (1.160). ... In fact, the Rig Veda sees the cosmos as a thousand-branched tree (3.8.11, 9.5.10). Building on this symbol, the Gítá uses the striking image of the cosmic ashvattha (the pipal or holy fig tree, Ficus religiosa) with its roots above and branches below, to remind us of the real source of this manifestation. Elsewhere in the Mahábhárata, it is said that he who worships the ashvattha worships the universe: such is the often forgotten concept behind the worship of sacred trees in India, particularly in temples—once again, the universal at the centre of daily life."