The 'Treasury of Dharma' illustrates that the teachings of Buddha are indeed a rare and most precious treasure which , if one is able to see its value and is skilfull in using it, not only fulfills one's temporary needs, but accomplishes the result of lasting happiness. If ignorance, egoism, greed, hatred, pride, jealousy and so on forcefully dominate one's mental continuum, endless problems and sufferings for oneself and others will result instead of peace and happiness. On the contrary, if satisfaction, contentment, altruism, patience, love, compassion, wisdom and so forth are strong and stable in one's mind, even negative conditions are transformed into supportive factors. Since the faults in the mind , no matter how great they may seem, are not in the nature of the mind itself, they can be totally eradicated, and no matter how weak the positive qualities may seem, they can be developed infinitely. The accurate methods to achieve both are the essence of the teaching of the Enlightened One, and the content of this book.
Geshe Rabten is one of the first to bring Mahayana to the West, AND was a guru of Lama Yeshe and Lama Zopa. This book compiles his teachings during a week long retreat in Switzerland in the 70s. I gained a lot out of this small book, even if the topics weren't new to me. I particularly liked his samatha advice
I will highly recommend this to anyone who is new or interested in Tibetan Buddhism.