Academic Advice

Here is a letter from the Rebbe to Professor Velvel Greene dated Erev Lag B'Omer 5729 (1969). In a few places the words are unclear. Since most of his letters have been publicised I assume this has been printed somewhere but I haven't seen it anywhere.

I have just seen this letter printed in שלום וברכה that seems to include all of Professor Greene's letters.

Freedom from all anxiety and stress

Here is a letter dated 9 Nissan 5726 which encourages positive thinking and mentions that Pesach is a festival of freedom from all anxiety and stress

Rapid Improvement

Here is a letter to Shlomo Carlebach to share with his group about a lesson from Pesach, that rapid improvement is possible if one really desires.