'Blessing' in the Bible

The cup of blessing which we take, does it not give us a part in the blood of Christ? and is not the broken bread a taking part in the body of Christ?

For if you give a blessing with the spirit, how will the man who has no knowledge say, So be it, after your prayer, seeing that he has not taken in what you are saying?

For your giving of the blessing is certainly well done, but of no profit to the man without knowledge.