<!-Quote-!>Quote:"The spiritual world is not even guaranteed to exist." Guaranteed is a strong word. There is no guarantee that the material world exists. Tomorrow, it all could go POOF, and you would look in vain for your guarantee. <!-/Quote-!>
If the material world ceases to exist, then
I cease to exist. If the spiritual world ceases to exist, then is there any evidence that would show that I cease to exist? Accordingly, my very existence is inextricably and undeniably tied to the existence of the material world. Beyond that, the mental world is included in the material one as thought is demonstrably tied to the brain and has physical manifestation. The brain is the vehicle of thought. The absence of the brain will lead to an apparent lack of thought. The fact that I can be taught abstract concepts that I did not before know or understand is evidence of the reality of the mind. The brain consumes calories when it thinks. There is such thing as brain waves. The transmission of ideas requires sight and hearing. Abstract concepts cannot exist independently of the material world. Can you name one that does? Did you not need your senses to learn it? Do you not need energy or matter to put it into practice? In short, is there any way for an abstract concept to exist without having some manifestation in the material world?
The material world does exist, but nonetheless, this does not mean it is not prone to mis-perception or mis-interpretation. Consider the case of a mirage, there are very real principles at work creating the illusion and there is a very real cause for what you are seeing, but your interpretation that the mirage is the real deal would be false.
You are deriving two conclusions of the material world of which I am speaking that are erroneous:
1. There is no place for thought, perception, and human error.
2. Pleasure is the measure of success.
Just because someone misinterprets a phenomena does not mean that phenomena is uncertain to exist. The table is there. There is no power in the universe that will make the table inexplicably disappear. The keyword is inexplicably. The table's existence is certain even if everyone denies the existence of the table. If you tried running through this table in the belief that it did not exist, you would run into it. The laws of nature may sometimes be erroneously explained, but they ALWAYS function in an 'explainable' manner. All truth is logical. All truth can be explained. All truth can be observed (even if it requires the help of some instrument, like a microscope or voltmeter). There is no evidence to suggest otherwise. As you said, the earth is round. This can be proven. The appearance of flatness is an erroneous conclusion based on incomplete observation. Just because something is not as it seems does not mean it is less real; it means that your understanding is less correct.
<!-Quote-!>Quote:Descartes put it very well--all we know about the physical world is what comes through our senses, but we don't know whether we can trust our senses. They could be faulty, or we could be deceived by some evil being. I don't know whether DC said this, but it seems to me you have to take a step of faith to truly believe that the world you sense is as it seems. <!-/Quote-!>
Descartes said this, but in fact, you are saying that I need to place faith in the senses to be guaranteed of their existence. It isn't that simple... consider the assumptions in the alternatives of this proposition:
1. The material world my senses perceive exists.
2. The material world my senses perceive does not exist. There is an being that is capable of deceiving my senses. This being also desires to deceive my senses.
Which view makes more assumptions?
<!-Quote-!>Quote:What causes people to do what they think is right, even when it means denying pleasure in the material world? I say that's evidence for the existence of a spiritual world. You won't get actual proof, though, of anything, material or spiritual.<!-/Quote-!>
First, this is circular reasoning.
The spiritual world exists because people take right action over pleasure, but don't people take right action over pleasure because they believe the spiritual world exists?
Second, who says pleasure is the highest goal of the material world? Couldn't the person take right action because they wished to maintain an ordered, lawful society? Or because they wished to defend a friend? Or because they wished to make new friends? Or because they wanted to earn a good reputation? Or because they identified with the victim (or issue)? All of these are self-serving. In your hypothetical, taking right action denies pleasure, but could seek to accomplish another goal. If this was taken to the point of self-sacrifice and martyrdom, then it could be argued that it is not self-serving, but the fact that someone would martyr themselves is evidence of belief in a spiritual world rather than evidence of the existence of a spiritual world.
If you think that I believe that pleasure is the measure of success and the goal of the material world, you'd be quite wrong. On the contrary, I live a very ascetic lifestyle. The life of accomplishment and creation is what I aspire for. I cannot do anything EXCEPT what I think is right without not only feeling guilty, but betraying and harming my existence. Anyone can see that right action and self-serving action are synonymous. If I refuse to aid someone being robbed, how can I reasonably expect someone else to do the same? If I can prevent the robbery, do I not condone this robbery by taking no action. When I condone this robbery, do I not condone all robbery? When I take no action, do I not encourage others to do the same? However, if I am incapable, for certain, of preventing the robbery, what use is it to attempt to? Do I not add to the robbers pockets by presenting another target of robbery? In effect, do I not support the robber by taking ill-considered action? The individual's action translates to society's scale because society is nothing more than a collection of individuals. It does not make sense to do anything other than the right thing.
Logic explains what is possible and impossible. Science explains what is physically possible by interpreting and explaining natural phenomena. However, science is an explanation of natural law. Therefore, scientific explanations can be mistaken, but nature ALWAYS follows her own laws. There may be some undiscovered principle, but it still exists whether or not it has yet been discovered through science.
In the face of MOUNTAINS (quite literally) of evidence in favor of the material world, it amazes me that people could believe that it cannot be proven. On a side note, I'm saying that the spiritual world merely cannot be proven to exist. I'm taking the position that the material world is far more valuable than any spiritual world.
Back to my original point, give me ONE, just one, aspect of "life" that can be proven to be independent of the material world, and you can prove that Buddhism is not opposed to life.
Why?
If I sacrifice my well-being to the benefit of nobody else's well-being, but instead for a spiritual cause, I'm acting to a net loss of material existence.
If I'm acting at a net loss of material existence and no aspect of "life" can be demonstrated to spiritually exist, then I'm acting at a net loss of life.