"Does one need a guru?" Swami Kriyananda was once asked. "No," he replied, "That is, unless you want to find God."
Nayaswami Krishnadas talks about the need for a guru, and how our Self-Realization line of masters had gurus even though they were already enlightened souls.
He explains how the magnetism of the guru, more than his or her words or outward guidance, is what helps us advance on the spiritual path, and shares stories from his first meeting with Swami Kriyananda that illustrate this.