The Rebbe reassures an educator that efforts in instilling Yiddishkeit always leave a lasting impact, even if not immediately visible. He addresses challenges in prayer and thoughts of the past, offering practical advice for teshuvah and personal growth, and stresses the importance of Torah learning, daily Tehillim and Tanya, and positive influences for one's children.
https://www.torahrecordings.com/rebbe/igroskodesh/015/008/5407