Group
Source: TW
While mantra-practicing yogin-s can attain several siddhi-s they are a rare minority. The attainment of siddhi of several mantra-s, especially of the shaiva & its derivative shAkta tradition are not easy for solitary sAdhaka despite having the predisposition & devoted practice. They usually need the “chakra” of sAdhaka-s for proper expression and may be seen only within that context. Many modern aspirants miss this aspect and hope they can attain these in isolation.
Time
For one man, it took 10 years to achieve the siddhi after being initiated by someone reputed to be one of the most accomplished guru-s in jambudvIpa. The other man, laboring sincerely in j~nAna, and grasping the siddhAnta, has practiced for 35.5 years, but the same siddhi seems to get only farther away from him; yet, he has not given up and labors on. Maybe that’s why H say for some, it might take more than one life.