What books in Buddhism contain the truth of being a man?

In Buddhist scriptures, there are mainly the Good Life Sutra and the Three Generations of Causality Sutra.

Thought-provoking Buddhist scriptures include Baiming Sutra and Baiye Sutra.

Other Tripitaka, Diamond Sutra, Amitabha Sutra and Heart Sutra are the most familiar and the best.

These classics, you can search for scriptures online, or you can search for videos to watch.