Reasoning is a powerful tool for discovering truth, but it has its limits. It can only tell us about the world as it appears to us, not as it really is. It can also only tell us about things that are logically consistent, not things that are possible but not logically necessary.
For example, we can use reasoning to prove that the sum of the angles of a triangle is 180 degrees. This is a logical truth that follows necessarily from the definition of a triangle. However, we cannot use reasoning to prove that God exists or that the universe is eternal. These are metaphysical truths that cannot be proven or disproven through reasoning alone.
To discover transcendental truths, we must use other methods, such as faith, intuition, or revelation. These methods are not as reliable as reasoning, but they can sometimes lead us to truths that we could never discover through reasoning alone.
Ultimately, the best way to discover truth is to use a combination of reasoning and other methods. By using all of our tools, we can come to a better understanding of the world around us and our place in it.