Shaving Hair to Renounce Attachment
Rinpoche gave the following commentary on shaving one's hair as an ordained person.
While you are shaving your hair, remember how not to waste this most precious human body, which is most rare, and this precious human rebirth, qualified by the eight freedoms and ten richnesses, which is much more precious. In each second, you have every opportunity to achieve happiness: in future lives, liberation from samsara, and enlightenment. Having eliminated all the defilements and completed all the qualities, then you are able to do perfect work, causing happiness for all sentient beings, bringing them from the lower realms to higher rebirths, bringing them to happiness, liberation from samsara, and into full enlightenment.
In each second, the perfect human rebirth is more precious than whole skies filled with wish-granting jewels. Even with that many wish-granting jewels, one cannot stop rebirth in the lower realms and samsara, and cannot stop binding oneself to a lower nirvana, the blissful state of peace.
Even if you don't have a single jewel, a single rupee or Euro, if you have a precious human body you can practice Dharma and achieve enlightenment, like Milarepa and many other beings.
If you are an ordained person, shaving your hair is renouncing the marks and signs of worldly life, the adornments of householders, such as long nails, hair, and makeup. It is the opposite to attachment. The hair is the part of the body one relates to the most, the object of much of your attachment, and also a major object of others' attachment. Lay people, especially in the West, spend a lot of time and money on their hair. It is basically a cause of hallucinatory appearances of oneself and others.
An ordained person is shaving his or her hair to renounce attachment, the cause of samsara and of all life's problems, such as relationship problems. In some ways, it can be said to be cutting attachment. Of course, nowadays it is fashionable for the military, singers, and artists to shave their hair, but some years back it was considered frightening. The culture has changed and perhaps now people also shave their hair out of desire.
When you shave your hair you make every minute and hour of your precious human body more meaningful. You also make your most rare, perfect human rebirth more meaningful, every second of which is so precious, offering you an opportunity to achieve happiness in the future, liberation, and enlightenment, as I mentioned above. If one second is wasted, it is a much greater loss than losing a sky full of wish-granting jewels.
So, begin by motivating with bodhicitta: "The purpose of my life is to free every single sentient being from suffering and lead them to liberation and full enlightenment, therefore I am going to practice the vow of shaving my head, renouncing the adornments of the householders' life, and also living in the practice of renouncing the delusion of attachment."
Visualise the person shaving your head as Manjushri and the razor as wisdom realizing the selflessness of the person and of the aggregates. Then, think that the root of samsara is ignorance grasping at the "I" as truly existent and grasping at the aggregates as truly existent, as well as all the other delusions, such as anger, attachment, jealousy, pride, doubt, etc. You can think of the 84,000 delusions that spread from the three poisonous minds.
Use the same visualization when you shave your own hair. This is not only for ordained people. Lay people who shave their hair can think similarly. Then, at least the action becomes a remedy to delusion, and thus it becomes Dharma.