Excerpt from Sri Chinmoy's book, The Master and the Disciple.
A real spiritual Master tries to bring to the fore the inner divinity of the disciple from deep within the disciple’s heart. He knocks at the disciple’s heart-door and awakens the divine child in him, which we call the soul. He tells the soul, “You will look after the other members of the family—the physical, the mind and the vital—and take care of them. They are making mistakes constantly. Now give them new life, new meaning, new purpose.”
It is the spiritual Master’s job to make his disciples feel that without love, without truth and light, life is meaningless and fruitless. The most important thing a spiritual Master does for his spiritual children is to make them consciously aware of something vast and infinite within themselves, which is nothing other than God Himself.
The highest transcendental Truth is within our hearts, but unfortunately we have not yet discovered it. So I ask my disciples to go deep within and meditate on the heart, which houses the soul. Eventually they learn how to contact the soul and start listening to its dictates. At that time they have begun to make real progress toward discovering their highest and deepest Self.
If one is already developed, that is to say, if one has been practising the spiritual life in previous incarnations and is in a position to listen to the dictates of his own inner being, it is not absolutely necessary for him to have a spiritual Master. In that case he has only to go deep within and practise the spiritual life most sincerely. Since he doesn’t want a Master’s help, he has to depend entirely on himself and on the boundless Grace of God. But we have to know that the spiritual path is very arduous; only on rare occasions have people realised God without the help of a spiritual Master. Most spiritual Masters themselves took help from someone for a day or a month or a year or ten years before they realised God.