Sūta said: As is knowledge so is meditation. Hence, one should practise meditation.[35] At the outset meditation is laid down as Saviṣaya (having an object) and then Nirviṣaya (having no object). The leading yogin shall practise meditation in six ways[36] as follows:—for the duration of two, four, six, ten, twelve and sixteen units of time in order. Certainly he shall be liberated.