'Bless' in the Bible

we labor, working with our own hands. When we are reviled, we bless; when we are persecuted, we endure it;

The cup of blessing that we give thanks for, is it not a sharing in the blood of Christ? The bread that we break, is it not a sharing in the body of Christ?

Otherwise, if you praise with the spirit, how will the uninformed person say “Amen” at your giving of thanks, since he does not know what you are saying?