Sorrowful and inclement meditations hinder spiritual uplift, They obscure the attributes of soul. They cause the natural disposition of self to disappear and initiate corrupt dispositions. Both these meditations are inauspicious and lead to undesirable destinations. They are not related to spiritual advancement in any manner. It is one of the causes of the purification of the soul.
Righteous meditation is of four types.
Embodiment based righteous meditation is contemplation about soul residing in the body. From the aspect of reality, soul is conscious, and has absolute perception and knowledge. Such thoughts constitute embodiment-based meditation. The aspirant imagines himself seated in the lotus position on the crystal throne and meditates on the means of destroying karma. The aspirant further imagines another lotus of eight petals near his heart, considering that the eight petals represent the eight kinds of karma.