It is, however, a great deal more important to _be_ than to _do_; for it is out of the _being_ that the _doing_ must come. The point requiring the most anxious consideration is that we may learn to truly know and love the principle upon which safe conduct depends. He who loves purity for its own sake—who hates impurity because of its vileness, instead of for the painful consequences which follow its practise, will never go very far astray from those manners which are of good report in any society on earth. He will instinctively avoid the appearance of evil as far as he knows how evil appears. There are a few principles which are always a safeguard and defense to those who will be controlled by them, which if woven into familiar thought will render correctness in the details of conduct spontaneous and inevitable. And yet circumstances may modify this fact. It is sometimes slow work to get hold of a principle; and some specific teaching as to just what to do, and what not to do, will often be a great help to even those who are pure of heart, and have a mind to avoid the appearance of evil. Every detail of life must take note of the fact that the human unit called man was created male and female, and must begin his earthly career as boy and girl, each at best but a half of this unit. This, with many correlated facts, must be kept before us in the process of training. Up to a certain period boys and girls can play together and associate with perfect unconsciousness of any difference between them, but the careful parent and teacher must be alert with reference to the time when nature awakens, after which their association can only be safely on two lines,—Christian work and general good fellowship; and these always under the chaperonage of some reliable and mature woman. This is especially necessary in all lines of work to which Christian young people in these days of special activity among the youth would be urged, such as missionary meetings, cottage meetings, Sabbath-school, house-to-house visiting. Without such chaperonage, boys and girls, young men and young women, should never go together, even in Christian work; but girls by themselves, and boys by themselves. This is made necessary by the fact that nature has been perverted, that the enemy of all purity has taken possession of every avenue of thought, even from the cradle, and has filled the mind of childhood with unprofitable imaginings, for which the only cure is the knowledge of the truth pure and simple, adapted to their comprehension, and such opportunities for association as shall make them mutual helps without stimulating that self-consciousness that leads to curiosity and evil suggestion.