What evidence shows that our training has been effective, and to whom does the credit go? Has the training that Jehovah has provided been effective?
( খ) যিহোৱাই কেনে তিনিটা পদ্ধতিৰ যোগেদি তেওঁৰ সেৱকসকলক পৰিচৰ্য্যা কাৰ্য্যৰ বাবে যোগ্য কৰিছে?