Because one does not want to be disturbed, to be made uncertain, he establishes a pattern of conduct, of thought, a pattern of relationship to man etc. Then he becomes a slave to the patter and takes the pattern to be the real thing.
True observation begins when devoid of set patterns; freedom of expression occurs when one is beyond system.
The truth is outside of all fixed patterns.
If you follow the classical pattern, you are understanding the routine, the tradition, the shadow -- you are not understanding yourself.
Do not deny the classical approach, simply as a reaction, or you will have created another pattern and trapped yourself there.