The time will come when you will encounter, more or less unexpectedly, the shock of hearing our doctrines contradicted. Even if the shock is not violent, you will, nevertheless, be aware of the intellectual atmosphere of our times, and perhaps unconsciously you will breath in the air that surrounds young men of the present day, and in time you will be surprised to find that it has intoxicated you, and that you feel uncomfortable in the atmosphere of faith. You will notice that an outwardly spiritual life does not correspond with your interior reality, and undoubtedly, in your surprise and discouragement, you will be tempted to leave behind what will seem to you burdensome and a hindrance to the free development of your intellect.
Few people, especially few young men, escape this crisis of faith. Perhaps we should not regret it, were it not that so many become depressed and irremediably disturbed spiritually. Those who by God's assistance and by the means about which I now speak pass safely through this dangerous time, possess from then on a courageous spirit and really understand what faith is.
It seems to me that anyone growing up in a Christian home now will hit, or be hit by, this atmosphere and this crisis as soon as he begins to think at all past childhood. I have no broad data, but it seems to me that the majority do not come through, but succumb pretty quickly. Often there is no sense of crisis at all; they just fall into modern secular assumptions, which they experience as liberation (which it certainly is with respect to sex and other pleasures). Leseur was presumably writing roughly a hundred years ago, since she died in 1914. Now we don't need to qualify "atmosphere" with "intellectual"--it's an all-encompassing and almost inescapable thing, all the more powerful because so much of it bypasses the intellect.