About this wonderful book of words, Peter Mark Roget wrote:
"We seek in vain the words we need...The appropriate terms, notwithstanding our utmost efforts, cannot be conjured up at will. Like 'spirits from the vasty deep', they come not when we call; and we are driven to the employment of a set of words and phrases either too general or too limited, too strong or too feeble, which suit not the occasion, which hit not the mark we aim at."
"In every process of reasoning, language enters as an essential element. Words are the instruments by which we form all our abstractions, but which we fashion and embody our ideas, and by which we are enabled to glide along a series of premises and conclusions... It is on this ground that the present work founds a claim to utility."