10 SKETCHES OF GREAT TRUTHS We have seen that Theosophy builds its teach- ing on the Unity, a seeing in each form the expression of a common Life" it naturally follows, therefore, that once we realise the Unity, the oneness, we realise that a fault committed against that unity is a fault committed against brotherhood and is felt by each member of that brotherhood, it reacts on each and there can be no separate life in the sense that we live to ourselves. We cannot live to ourselves or by ourselves as separate units, for in the big and wide sense our every action, our every thought reacts on humanity, for what injures one must injure all though it may be to a very slight degree. This is a big thing to say and perhaps it is one of the biggest things for us to realise if we want to become practical Theosophists. We either help or hinder—there is no middle course —we aid or we clog and we make our own choice as to which we intend to do. You will say that each one is so small, so insignificant that the difference can be but slight. Yes that may be so, but in a vast bit of machinery the smallest screw is of use and the failure of the small screw to do its work may disorganise a large part of the vast machine. This thought is worthy of much consideration, in one sense it makes us realise the vastness of the meaning of