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Shaykh Mawlana Mohammad Manzur Nomani (Allah have mercy on him) wrote to a disciple,
‘The vigilance in remembrance (dhikr), contemplation (fikr) and spending time alone with Allah (khalwa) is decreasing in those associated with Tabligh. This is a dangerous development. There are two wings (needed) for Tabligh. First is the effort and striving among the public. The other is having a very special relationship with Allah. It is essential to maintain a balance between them.’
Meyray Shaykh meyray Hazrat Mawlana Mohammad Manzur Nomani ra by Shaykh Qutubud-deen Mullah db, page 38