This lecture by Swami B.G. Narasingha Maharaja was on Bhaktisiddhanta Saraswati Thakura's Appearance day, 3rd February 2013.
Swami Narasiṅgha begins by explaining how history is perceived by different persons according to different levels of perception according to their experience, spiritual connection etc.He goes on to say that great personalities like Sarasvatī Ṭhākura appear in this world to lift the veil of māyā in order that we can perceive things properly.
Narasiṅgha Mahārāja also speaks about the science of reincarnation, how many people misunderstand this, and he discusses past-life regression. He speaks about the illusion of family life and how sometimes enemies from previous lives may be reborn in the same family.
Narasiṅgha Mahārāja says that although many people may have been born on the same day, same year and even under the same astrological sign as Sarasvatī Ṭhākura, their lives were probably lived out in the darkness of māyā. However, Sarasvatī Ṭhākura was born to reveal truth.
He explains how Sarasvatī Ṭhākura was a born-brāhmaṇa and speaks about the real meaning of upanayana. He discusses how the sense of sight is not very reliable, but sound is far more reliable and important.
He explains the connection between the potency of the mantra and the cultivation of proper knowledge. It is very rare that one receives a mantra without knowing the meaning, or without any lesson from the guru, and you become spiirtually awake. Narasiṅgha Mahārāja also explains why Sarasvatī Ṭhākura gave upanayana to his followers.
Narasiṅgha Mahārāja says that when Śrīla Bhaktisiddhānta Sarasvatī started his mission, it was opposed and resisted by every sophisticated section of society, but after his disappearance, many of his opponents understood his revolutionary tactics and saw him as a revivalist.
Mahārāja also explains that whatever Śrīla Prabhupāda did in his preaching was already done by Sarasvatī Ṭhākura, except for performing the marriage ceremony for his disciples.