“If a man be pure in thought, he will be correspondingly pure in action; but if he allows his mind to roam in unrestricted freedom through the various avenues of evil or to dwell unchecked upon the contemplation of forbidden indulgences, it will not be long before his feet tread these paths and his hand plucks the tempting but deceitful fruit. When once the tempter gains the citadel of his heart, his power is very great, and there is no knowing to what excess of folly and crime he may incite his unhappy victim.” George Q. Cannon, Gospel Truth, pp. 200