"For so the whole round earth is every way Bound by gold chains about the feet of God" ~ Alfred, Lord Tennyson
The Tree of Life is symbolized by many particular trees: the oak, the ash, the fig and others throughout the world. The axis is the Way itself, the way of return to the Absolute. It is also symbolized by man-made things: the ladder, the mast, weapons like the lance, and the central pillar of edifices. As architects know, many buildings are built round a central axis which is not in fact there, which is not Religio Perennis materialized. Very often in traditional houses the hearth is the center of the house and the chimney through which the smoke rises is another figure of the axis. And things which are normally horizontal are symbols of the axis: a bridge is also a symbol of the world axis. Witness the title Pontifex, the maker of the bridge, which is given to the highest spiritual authority of the Church -- the bridge, which is the bridge between Heaven and earth. Another fundamental symbol is the river. There are three aspects to the river: the crossing of the river symbolizes the passage from this world to a higher world, always, but then there is the river itself. There is the difficulty of moving upstream which symbolizes the difficulties of the spiritual path, of returning to one's source against the current. There is also the symbolism of moving in the other direction to the ocean, of returning finally to the ocean; that is another symbol of the Way. In this book amongst many other symbols, Guénon also treats of the symbolism of the mountain, the cave, the temporal cycle. In the temporal cycle the solstices of summer and winter are the gates of the gods according to Hinduism. The gate of the gods is the winter solstice, in the sign of Capricorn; the gate of the ancestors is the summer solstice, in the sign of Cancer.
Rene Guenon's doctrine, & perhaps that of Jonathan Edwards as well