In fact, had he perceived the forms of truth and falsehood when enclothed in substance, he would have comprehended them only with respect to their benefit or harm to the specific substance. In other words, after the many trials the world has endured with these attributes of truth and falsehood, people observed the tremendous ruin and harm that deceitful people have caused with their lies, and the great benefit that truthful people have brought about by confining themselves to speaking only true words, and they arrived at the conclusion that no attribute is more important than truth, and nothing is more despicable than the attribute of falsehood.
Had the idealist understood that, he would certainly have agreed to the stance of the Torah and would have realized that falsehood which saves even one person from death is inestimably more important than however great and praiseworthy the abstract attribute of truth may be.