1- A realisation that purity of all the vehicles is the prime essential. If a dark brother gains control over any man it but shows that that man has in his life some weak spot. The door whereby entrance is effected must be opened by the man himself; the opening whereby malignant force can be poured in must be caused by the occupant of the vehicles. Therefore the need of scrupulous cleanliness of the physical body, and of purity of thought in the mental body. When this is so, co-ordination will be present in the lower vehicles and the indwelling Thinker himself permits no entrance. 

2- The elimination of all fear. The forces of evolution vibrate more rapidly than those of involution and in this fact lies a recognisable security. Fear causes weakness; weakness causes a disintegration; the weak spot breaks and a gap appears, and through that gap evil force may enter. The factor of entrance is the fear of the man himself, who opens thus the door.

3- A standing firm and unmoved, no matter what occurs. Your feet may be bathed in the mud of the earth, but your head may be bathed in the sunshine of the higher regions. Recognition of the filth of earth involves not contamination.

4- A recognition of the use of common-sense and the application of this common-sense to the matter in hand. Sleep much and, in sleeping, learn to render the body positive; keep busy on the emotional place and achieve the inner calm. Do naught to overtire the body physical, and play whenever possible. In hours of relaxation comes the adjustment that obviates later tension.