The Blessings of Building a Stupa
Even though no living master may be present to teach the Dharma in actuality, generation after generation, people continue to see the Stupa with their eyes, receive blessings, understand that there are the Three Jewels in which they can place their trust, and in this way, naturally, the Dharma continues. In the same way, when building a Stupa for the remains of a great master, his power and blessings will remain. That is the reason to build a Stupa.
-- Thrangu Rinpoche