In fact, meditation entails forgetting all worries, intentions and dilemmas, and stabilizing the mind. It involves contemplating about the nature of soul, thinking of the difference between soul and matter, and concentrating on the true self. Meditation purifies the mind, speech and body. However, it is of no avail to inflict pain on the body without purifying the thoughts. One who stabilizes the mind and concentrates on the self definitely achieves salvation.
Meditation is the only means to stabilize the mind.
The last two are auspicious because they help destroy karma. The Sanskrit word aarta means sorrow. The thought-activity caused by an outburst and intensity of sorrow is sorrowful meditation. The meditation involving inclement thoughts is called inclement meditation. Cruel, angry, immoral, nonreligious and passionate people indulge in such meditation.