Rituals

In factories knowledgeable experts do extensive trials tests and come to the best way of doing a process,

for example,

to get a fine painted finish on a product, he makes the process specification, in detail, on inputs, materials, tools, methods, precautions, safety aspects, and educates the technicians and trains them guiding step by step, so that by following these procedures, the technicians delivers the quality output with minimum waste, in minimum time, 

they will not know the full science and logic behind these specifications, yet by following the specs rightly as specified they produce the desired output

it is essential that those who make the procedures are fully knowledgeable 

if not, the specs they make may lead to disastrous results

similarly 

in spirituality the rituals and rules are formed by the best masters, based on the authenticity of self realization,

 

if not

they loose the very purpose for which they are made .

hence the emphasis on the purity of knowledge in every tradition