The spiritual master in the heart of the surrendered devotee is the Supreme Lord Himself. He manifests as the beloved initiating spiritual master and the instructing spiritual masters. It is the Supreme Lord who, acting as the spiritual master in the heart, enlightens us with buddhi-yoga, or divine consciousness. And this consciousness helps us understand the Supreme Lord as He is.
The sages say that when we surrender to the Lord, we will clearly see how He personally makes arrangements for us, even in small matters. Then we will easily see how with His omnipotent supreme intelligence He is assisting us out of love. So it is unnecessary to waste time in further speculation. We have to vanquish illusion, develop equanimity and spontaneity, and practice bhakti-yoga. Then a supremely powerful force will gradually transform our material existence into spiritual existence. All our misconceptions, accumulated over millions of lifetimes, will be rectified in a short time.
– from Renunciation Through Wisdom