Explain the use of Yantras and Mandalas in Tantra, and how they are used for meditation and visualization.

In Tantra, Yantras and Mandalas are visual aids that are used for meditation and visualization. Yantras are geometric symbols that represent various energies or deities, while Mandalas are circular diagrams that represent the universe or a particular deity. Yantras are created using various geometrical shapes, such as triangles, circles, squares, and hexagons. These shapes are arr....