As the thread says, is it ethical to break one's own ethical principles? What about if one holds ethics that another considers unethical?
For example, if a politician opposed gay marriage, but voted in favour of it because the voting wasn't anonymous, would that be unethical?
Or if someone was asked to help promote an event that was Asian or Black only, but refused because he or she opposed groups that were restricted to one particular group or restricted another. Would it be any different if the person was of that group than if he or she was of a different one?
Thoughts?
I would propose that it hinges on what your precise definition of ethics is, and whether it varies in meaning in its different contextual usage.
For example, one situation where by one grows in worldly understanding would naturally and validly lead to the modification, or change in their relative ethical outlook on life.
Now a question like 'is it ethical to break one's own ethical principles?' can be interpreted in different ways.
In so far as 'ethical' is used simply to denote the nature of the principle we are talking about, then i think it is ethical to change ones views if its for the right reasons. ie it could be written ' is it ethical to break one's own principles?' - which of course it is if what it means to be ethical is to be responsible to the point that you are dynamic, reactive and open to change when new life experiences warrant a change in your principles.
But if you're breaking your principles as they currently stand (as in referring to them as ethical suggests they are the most ethical principles you hold to date, with none new to supersede them) then that's breaking them in a manner which is inherently unethical. i.e. you arnt simply changing for the better, but for the worse or for simply arbitrary reasons.
An additional consideration is that ethical and unethical behavior can occur simultaneously if you focus on different things. Such that a person could change and act in opposition to their principles, providing an ethically praiseworthy result, but that his/her motives for that action where entirely unethical, perhaps simply done for self preservation.
A further point would be in what the word ethical means, as its quite a broad umbrella term. In one way it could refer more heavily to simple cultural norms and practices, a more conventional way of life, and rules to which you adhere. On the other hand it could refer to highly specific and well thought out reasons to the governance of any particular action. Such that the nature of what is 'broken' and what it is it is 'broken for' is relevant to the overall ethical quality of the action. Such that one could be praised for being rude and impolite if its in defense of a vulnerable party, or the championing/safeguarding of human rights.
A final question to ask is, if you are incapable of breaking held principles, ethical or otherwise, for good or bad, are you in fact a being capable of ethical action at all?