For in much wisdom is much grief; and he who increases knowledge increases sorrow. The words of the wise are like goads; and like nails well fastened are words from the masters of
assemblies, which are given from one shepherd. Furthermore, my son, be admonished: of making many books there is no end; and much study is a weariness of the flesh. - Ecclesiastes 1:18; 12:11-12 (WEB)
Skeptics often ask believers how they know that the Bible is, in fact, the true or only word of Jehovah God. How do we know it isn't The Dhammapada or the Kojiki or any other text? It's a valid question, but it can also be applied to the skeptic. How do they know it isn't? The solution is simple and obvious but not commonly put into practice. The solution is to read and research. Look for the answer. What they would find is that the Bible is unique in many ways, including its claim of divine inspiration and historic authenticity.
Siddhartha Gotama, also known as Gautama Buddha, allegedly said that there was no God, and if there was, he wouldn't be concerned with the lives of men. There is no source material contemporaneous with his life, though it is thought that a council of five hundred monks set out to decide the authentic teachings, this is debated among Buddhist scholars. The teachings were oral; Gautama is generally thought to have lived in the sixth century BCE, but according to the Sri Lankan Chronicles, the earliest Pali canonical texts weren't put into writing until the first or fifth century CE. Five hundred to a thousand years after his time.