A good spiritual teacher is like a tow truck driver who is on call twenty-four hours a day, and one of the hooks in his vast assortment is just the right size for us. When we get ourselves stuck in meditation and find we can't go forward or back, he pulls us forward just enough to get us free. Then, the moment we can move again, he removes the tow chain and lets us go forward again on our own.
— Eknath Easwaran, The Bhagavad Gita for Daily Living, Volume 2