In the Padma Purana also the same process is advised. There it is said that one should always remember Lord Visnu. This is called dhyana, or meditation-always remembering Krsna. It is said that one has to meditate with his mind fixed upon Visnu. Padma Purana recommends that one always fix his mind on the form of Visnu by meditation and not forget Him at any moment. And this state of consciousness is called samadhi, or trance.   (More...)