"The pipe is a link between the earth and the sky," explains White Deer of Autumn. "Nothing is more sacred. The pipe is our prayers in physical form. Smoke becomes our words; it goes out, touches everything, and becomes a part of all there is. The fire in the pipe is the same fire in the sun, which is the source of life." The reason why tobacco is used to connect the worlds is that the plant's roots go deep into the earth, and its smoke rises high into the heavens. There are personal pipes and family pipes as well as pipes for large ceremonies. The particular stone used depends upon the tribe's location, and various symbols are added to attract certain spiritual energies. Also, the type of tobacco used depends on tribal custom in the pipe ceremony. But despite these differences, there are certain important similarities: The pipe ceremony invokes a relationship with the energies of the universe, and ultimately the Creator, and the bond made between earthly and spiritual realms is not to be broken. Eagle Man begins a pipe ceremony by beseeching the West power, while thinking about the life giving rains and the ever present spirit world. Next, he beseeches the north power, the source of endurance, strength, truthfulness, and honesty, which are qualities needed to walk down a good path in life. Then, he will look to the east power. The east is where the sun rises, and the sun brings us knowledge, the essence of spirituality such as meditation practices. Without knowledge, we become ignorant and cause harm to ourselves and others. The fourth energy is the south power, which brings us bounty, medicine, and growth. Next to be acknowledged is the earth spirit. Eagle Man touches the pipe to the ground, and says, "Mother Earth, I seek to protect you." Since Mother Earth depends on the sun's life giving energy, the pipe is then held up towards the sky. Lastly, the pipe is held straight up to the Great Spirit, the Great Mystery, the unexplainable source of all life. These words are then spoken: "Oh Great Spirit, I thank you for the six powers of the universe." Most of us are not afraid of the Great Spirit. We don't fear something that has given us our life."