BEST Buy Sidh Shri Alokik Divya Saraswati Kavach Pendent Locket Rudraksha Puja ArticleThis yantra ensures success in studies and high achievement in competitive examinations. It is a known remedy for mental disorders, weak intellectual growth and lunacy. This yantra ensures success in studies and high achievement in competitive examinations. .It is a known remedy for mental disorders, weak intellectual growth and lunacy. Importance the red string? This particular colour of string is used in Kabbalah (Madonna, anyone?), Hinduism and with the Chinese. Kabbalists believe that red string wards off the evil eye and offers up protection..Hindu priests use red string, or kalava, after yajnas, prayers or pujas, the knots tied while reciting sacred mantras or chants. My husband and I have worn these until they naturally fall off (we're supposed to dispose of them in the ocean...). In Buddhism, red string signifies a blessing. Much like the kalava in Hinduism, the buddhist lama blows the power of his mantra into the 'protection and blessing cord' as he ties the knots.