Dharmarakshita (Tibetan: Serlingpa;Chinese: 金州大師) was a renowned 10th century Sumatran Buddhist teacher who composed an important Mahayana text called the Wheel of Sharp Weapons (Tib. blo-sbyong mtshon-cha 'khor-lo). He was the teacher of Atisha, who was instrumental in establishing a second wave of Buddhism in Tibet. 
'Wheel of Sharp Weapons' is an abbreviated title for 'The Wheel of Sharp Weapons Effectively Striking the Heart of the Foe.' This text is often referenced as a detailed source for how the laws of karma play out in our lives; it reveals many specific effects and their causes. A poetic presentation, the "wheel of sharp weapons" can be visualized as something we throw out or propel, which then comes back to cut us... something like a boomerang. In the same way, Dharmarakshita explains, the non-virtuous causes we create through our self-interested behavior come back to 'cut us' in future lives as the ripening of the negative karma such actions create. This, he explains, is the source of all our pain and suffering. He admonishes that it is our own selfishness or self-cherishing that leads us to harm others, which in turn creates the negative karma or potential for future suffering. Our suffering is not a punishment, merely a self-created karmic result. In most verses, Dharmarakshita also offers a suggested alternative virtuous or positive action to substitute for our previous non-virtuous behavior, actions that will create positive karma and future plesasant conditions and happiness.
- ↑ Thupten Jinpa. The Book of Kadam: The Core Texts. (Wisdom Publications: Boston, MA. 2008), 628nn129
- ↑ http://www.bodhicitta.net/The%20Wheel%20of%20Sharp%20Weapons.htm
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