Alfred North Whitehead Quote

Logic, properly used, does not shackle thought. It gives freedom, and above all, boldness. Illogical thought hesitates to draw conclusions, because it never knows either what it means, or what it assumes, or how far it trusts its own assumptions, or what will be the effect of any modification of assumptions.

The Organisation of Thought, Chapter VI (p. 132), Greenwood Press Publishers. 1974