As Master Chin Kung explains above, all the celestial Buddhas and Boddhisattvas are really indicative of enlightenment itself, which is our true, essential nature when the ego-self is peeled away.Each statue serves to inspire wisdom and awakening in each of us. They also represent certain aspects of Buddhism, which remind practitioners of the particular topic of teaching.
For example, Guan Yin Bodhisattva, the most popular Bodhisattva in China, represents Infinite Compassion. When we see this statue, it reminds us to apply compassion when dealing with the world, its people and surroundings.
However, people nowadays worship Guan Yin Bodhisattva as a god and pray for the relief of suffering and to eliminate obstacles. This is a superstitious view and misconception because people forget the fact that the statues are expressions of concepts in Buddhism.
In the center of the main cultivation hall, there are three statues, one Buddha and two Bodhisattvas. Buddha represents the true nature of the universe and human life, which is called “Buddha nature” or true mind. “Buddha” is translated from Sanskrit, and means someone who is totally enlightened.
The Buddha statue represents our original enlightenment and the Bodhisattvas statues represent the application of our original enlightened mind.
All the representations and applications are infinite and can be classified into two categories: wisdom and practice. For example, the Pure Land School pays respect to the Buddha and two Bodhisattvas of the Western Paradise. Amitabha Buddha (Infinite Life and Infinite Light) represents the infinite enlightenment that is an intrinsic part of our nature. Bodhisattvas Guan Yin (Avalokiteshvara) and Da Shi Zhi (Great Strength or Mahasthamaprapta) respectively portray compassion with kindness and great wisdom.
We should be compassionate and kind toward all beings. Our thoughts, views and behavior should be rational rather than emotional, for emotional behavior spells trouble. Therefore, we should not treat the Buddha and Bodhisattvas as gods. But will they help us?
Yes, they will by providing us with the knowledge of how to protect ourselves from delusion, thereby obtaining release from suffering. Once we have learned the background of the artistic components in Buddhist architecture, music and statues, we will gain an enriched experience when paying a visit to a traditional Buddhist temple.
However, nowadays many people do not understand the meaning and teachings of Buddhism. They mistake the multi-representations of Bodhisattvas as a sign of polytheism. What people fail to understand is the fact that the statues in Buddhism are teaching aids and not statues of gods.
All Buddhas and Bodhisattvas represent our nature and cultivation of virtue. We have infinite capabilities within our true nature that cannot be expressed by just one single term. Therefore, we have multiple representations; for instance, a capable person today may have many titles on his/her business cards to show his/her positions and accomplishments.
The Buddha and Bodhisattvas are actually representations of the nature within ourselves: Buddha, as in our true nature of mind, and the Bodhisattvas, in our virtue of cultivation. We all possess these qualities. Not until we come to realize the meaning of Buddhist symbolism, will we appreciate the sophistication and completeness of its education.
http://www.buddhanet.net/budasedu.htm
In bowing and expressing devotion to Buddhas and Bodhisattvas, we are humbling the ego-self to let our Buddha-self shine through.