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I just read this in a parenting book about the Alter of Slobodka. There were 2 talmidim who were friends, one did very well in learning and the other struggled. The one who trouble was constantly getting praised and attnetion from the Rebbe and the other one was ignored in a way. Much later, the better student was sitting shiva and the rebbe came. The student asked why he was there since the Rebbe seemingly never noticed him. The Rebbe replied that he was doing well in learning. Praise and attention would only benefit the yetzer hara. The student who struggled had a place outside of the yeshiva too and needed encouragement and from the Rebbe for his yetzer tov.
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One of my favorite stories is of a man who went to his rebbe and complained that no matter what, his wife was never ready for Shabbos on time. There were always things left undone. The rebbe looked at him and asked “Have you picked up a broom?”