'Humanity' in the Bible

For what was impossible to the Law--powerless as it was because it acted through frail humanity--God effected. Sending His own Son in a body like that of sinful human nature and as a sacrifice for sin, He pronounced sentence upon sin in human nature;

by setting aside the Law with its commandments, expressed, as they were, in definite decrees. His design was to unite the two sections of humanity in Himself so as to form one new man,