# the grace of our Lord

In this context, the word "grace" emphasizes the generosity with which Jesus had blessed the Corinthians.

# Even though he was rich, for your sakes he became poor

Paul speaks of Jesus before his incarnation as being rich, and of his becoming human as becoming poor.

# through his poverty you might become rich

Paul speaks of the Corinthians becoming spiritually rich as a result of Jesus becoming human.