He was not strong enough. He created still further the most excellent Law (dharma). Law is the Kshatra (power) of the Kshatra, therefore there is nothing higher than the Law. Thenceforth even a weak man rules a stronger with the help of the Law, as with the help of a king. Thus the Law is what is called the true. And if a man declares what is true, they say he declares the Law; and if he declares the Law, they say he declares what is true. Thus both are the same.

In plain words: Brahman still did not feel complete, so it created dharma, which means law or what is right. Right is stronger than any ruler, so nothing stands above it. Because of it, even a weak person can stand up to a strong one, as if a king were backing them. Right and truth are the same thing: speaking the truth is speaking what is right.