From The Buddhist Scripture: Samyutta Nikaya 45.8 (Connected Discourses or Kindred Sayings) "
"I have heard that at one time the Blessed One was staying in Savatthi at Jeta's Grove, Anathapindika's monastery. There he addressed the monks, saying, "Monks."
"Yes, lord," the monks responded to him.
The Blessed One said, "I will teach & analyze for you the Noble Eightfold Path. Listen & pay close attention. I will speak."
"As you say, lord," the monks responded to him. The Blessed One said, "Now what, monks, is the Noble Eightfold Path? [It is] as follows: Right view, right intention, right speech, right action, right livelihood, right effort, right mindfulness, right concentration.
And what, monks, is right view? Knowledge concerning dukkha, knowledge concerning the origination of dukkha, knowledge concerning the stopping of dukkha, knowledge concerning the way of practice leading to the stopping of dukkha: This, monks, is called right view."
Dukkha is an important Buddhist concept, commonly translated as "suffering", "pain", "unsatisfactoriness" or "stress". It refers to the fundamental unsatisfactoriness and painfulness of mundane life. It is the first of the Four Noble Truths and it is one of the three marks of existence. -Wikipedia-
According to Buddhist teaching suffering is basic to understanding life and the essential path to rising above life on the path to enlightenment and Nirvana
The eight spoke Dharma wheel symbolizes the Noble Eightfold Path The rim of the Dharma Wheel further signifies the ability to hold all of the teachings together by meditating and concentrating. The circular shape of the wheel symbolizes the perfection of Buddha's teachings. The hub in the center of the Dharma Wheel represents moral discipline.
I found it interesting how much a ship's wheel is similar to the Dharma wheel in both design and symbology. A ship's wheel is a symbol of victory, and a symbol of achieving the goals and superiority in everything. In addition, Ship's wheel symbolizes responsibility, clear approach and leadership.