It is easy for manual laborers, porters, and farm workers to work with their arms from morning till evening, but a delicate person of the nobility cannot do the same work for half an hour without fatigue and sweating. It is easy for a forerunner with a walking stick and comfortable shoes to ply the road for miles, whereas someone used to riding in a carriage has difficulty jogging slowly from one street to the next. All artisans who are devoted to their craft pursue it easily and willingly, and when they are away from it they long to get back to it; but it is almost impossible to force a lazy person with the same skills to practice that craft. The same goes for everyone who has some occupation or pursuit.
What is easier for someone who is pursuing religious devotion than praying to God? And what is more difficult for someone who is enslaved to ungodliness?
All priests are afraid the first time they preach before royalty. But after they get used to it, they go on boldly.
What is easier for angelic people than lifting their eyes up to heaven? What is easier for devilish people than casting their eyes down to hell? (If they are hypocrites, however, they can look toward heaven in a similar way, but with aversion of heart.)
We are all saturated with the goal we have in mind and the habits that result from it.
from Regeneration, Page 42