Yehuda Katz is addressed in the correspondence as an individual who regularly contributed financial support to the activities associated with the Rebbe, specifically those of the previous Lubavitcher Rebbe, Rabbi Yosef Yitzchak Schneersohn (the Rebbe Rayatz). The letter refers to him with honorific titles and acknowledges his established good customs and involvement in charitable giving.
The letter from the Lubavitcher Rebbe, dated 15 Menachem Av, 5711 (1951), responds to Yehuda Katz regarding his continued support and a recent donation. The Rebbe expresses that he was unable to report Katz's usual contribution at the Ohel (the resting place of the Rebbe Rayatz) on the eve of Rosh Chodesh Menachem Av, but refrained from urging him due to the previous Rebbe's instruction not to pressure Katz about financial matters. The Rebbe notes the spiritual significance of Katz's own inner prompting to give, likening it to a heavenly inspiration that leads a person to make positive resolutions, as discussed in Likkutei Torah and Chassidic discourses.
The Rebbe encourages Katz not only to maintain but to increase his good practices, referencing the principle of "ascending in holiness." He highlights the providential timing of these events on Tu B'Av, a day associated by the Sages with increased merit and spiritual growth, especially in Torah study and the mitzvah of tzedakah (charity), which is described as equivalent to all other mitzvot. The Rebbe concludes with a blessing for Katz's personal and material success, and that he should transform material pursuits into spiritual achievements, in joy and with a good heart.