In Tantra, the idea of polarities attracting each other refers to the concept of male and female energies or principles, often represented by Shiva and Shakti in Hinduism, being complementary and necessary for creation and balance. This concept holds that the union of these opposite energies leads to a state of spiritual enlightenment and oneness with the universe. In Tantric practices, this can be explored through techniques such as meditation, breath work, and physical rituals with a partner.