Sri Aurobindo
Letters of Sri Aurobindo
Volume I - Part 5
X’s new consciousness makes him feel more strongly the opposite forces that one contacts when one moves in the world and has to do affairs and meet with others and he is afraid of 
a response in his vital which will upset his sadhana or create difficulties. Evidently he is a man who is psychically sensitive or has become so to that thing which you blindly refuse to recognise even when you are in the midst of it – the play of forces. You can feel your friend’s atmosphere through the letter “so beautiful, so strengthening, so refreshing” and it has an immediate effect on you. But your mind stares like an owl and wonders, “What the hell can this be?” – I suppose, because your medical books never told you about it and how can things be true which are not known either to the ordinary mind or science? It is by an incursion of an opposite kind of forces that you fall into the Old Man’s clutches, but you can only groan and cry, “What’s this?” and when they are swept aside in a moment by other forces blink and mutter, “Well, that’s funny!” Your friend can feel and know at once when he is being threatened by the opposite forces – and so he can be on his guard and resist Old Nick, because he can detect at once one of his principal means of attack.