Augmentation of ‘spirit’ generally implies insolence and pride. For in common speech the proud are said to have a great spirit, and rightly - for wind is a spirit, and who does not know that we say of proud men that they are ‘swollen,’ ‘puffed up.’ Here therefore by “poor in spirit” are rightly understood ‘lowly,’ ‘fearing God,’ not having a puffed up spirit.
Reproduced in full. Translation: Oxford 1841 (Newman), public domain (Public domain).
Also cites: de Serm. in Mont., i, 1