Hazrat Moulana Muhammad Ilyaas (rahimahullah) once said:
Those involved in the effort of da’wat and tableegh have still not yet fully grasped and understood the branch of ‘ilm and zikr correctly. I am greatly concerned about this. The solution to remedy this weakness is that the brothers engaged in da’wat and tableegh should be sent to the ‘Ulama and the Mashaayikh to engage in da’wat under their supervision and to benefit from their knowledge of Deen and from their company (in this way, they will fully grasp and understand the branch of ‘ilm and zikr correctly).
(Malfoozaat Hazrat Moulana Muhammad Ilyaas [rahmatullahi ‘alaih] pg. 45)
Source: Ihyaauddeen.co.za