“Having conceived of our purpose, we should mentally mark out a straight pathway to its achievement, looking neither to the right nor the left. Doubts and fears should be rigorously excluded; they are disintegrating elements that break up the straight line of effort, rendering it crooked, ineffectual, useless. Thoughts of doubt and fear never accomplished anything, and never can. They always lead to failure. Purpose, energy, power to do, and all strong thoughts cease when doubt and fear creep in.”