It could mean many things but the most common explanation is to own up to your mistakes. to not walk around looking for someone else to blame. It depends on how it's used in context though.
The reason why the Egyptian people praise the river is because the Nile was a vital source of life for the Egyptians--as it provided for water and the irrigation of essential crops.
so that they could expand
Explanation:
they wanted to expand across america so they adopted a policy to keep the american indians away