God is good. He has a plan. Maybe Abram didn’t fully know what it was to be, but he knew that God was about to use him, and bless him in a big way. I like the way it appears in the original Hebrew grammar. Using double words to show the emphasis on the actions that Abram is to do, and the actions that God will do.
Just because a power is within our ability, doesn’t mean we have to act that way. Show grace and choose to not curse others. God’s preference is to be a blessing to all the wworld, keep his preference and keep extending grace and blessing to others.