Augustine of Hippo
And what of those who remain steadfast? Not everyone succumbs to doubt and turns away from faith; many strive to advance in their journey, many hold within them the desire to continue, and although they may not always put it into action, they nurture it and create the circumstances to bring it forth. What is the consequence of this? They shall be like chaff before the breeze (Psalms 34:5). The wicked are not akin to this; rather, they resemble the chaff driven by the wind from the surface of the earth. The wind symbolizes temptation, while the chaff represents the wicked. When temptation arises, the chaff is lifted; it neither withstands nor resists. Let them resemble chaff before the breeze, and let the angel of the Lord stir them up.