The bruised reed is a person who for the most part is in some misery, just as those were who came to Christ for help, and by misery he is brought to see sin as its cause, for, whatever pretences sin makes, they come to an end when we are bruised and broken. He is sensible of his sin and misery, even to his bruising; and, seeing no help in himself, he is carried with restless desire to have supplies from another, with some hope, which raises him a little out of himself toward Christ, though he dare not claim to have gained any present interest of mercy. This spark of hope being opposed by doubts and fears rising from his corruption makes him like smoking flax; so that both these together, a bruised reed and smoking flax, make up the state of a poor distressed man. This is such a person as our Savior Christ terms “poor in spirit” (Matt. 5:3), who sees his wants, and also sees himself indebted to divine justice. He has no means of supply from himself or the creature, and thereupon he mourns, and, upon some hope of mercy from the promise, and examples of those that have obtained mercy, he is stirred to hunger and thirst after it.
(Richard Sibbes, “The bruised reed”). Free PDF here http://www.onthewing.org/user/Sibbes%20-%20Bruised%20Reed%20-%20Updated.pdf