What is the significance of the supreme court case mcCulloch v Maryland?

The Court ruled that the federal government had the implied power under the Constitution to establish a national bank. Then the Court held that Maryland could not tax the bank, because the tax improperly infringed upon federal power. The case established two bedrock principles: First, that the federal government had implied powers to carry out its constitutional rights and, second, that the states were inferior to the federal government when it came to this power