We could say very briefly that mantras are sets of united and meaningful syllables that, when recited, generate a vibration that helps us to calm our mind, to free ourselves from thoughts and thus favour a greater connection with ourselves and with the present.
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Subtitles:
Manifestations of the Lord
Kali Yuga and the Qualities of Nature
Detachment
Soul and Body
The Divine and the Demonic
Devotional Service
Personal History
Purifies the heart
Devotion and dedication
Peace