At this point in time, though I understand what you are stressing: the importance of instruction, but at this time, I disagree.
How can a form be empty of spirit? How can spiritual instruciton, which points to what is real be substantial?
Diksa is contact, an opening, a channel through lineage to the original person and spirit. Our motivation at that time sows a seed, also. If i receive diksa as a hypocrite, to subvert, instruction might be less effective, to begin with anyway.
And that diksa, a bond, is constantly renewed, improved. If not, then how could I advance through instruction, but my original mixed motives for requesting diksa, even with sincerity, remain? For, example I may have a loathing for humanity!
Then again, My questions and understanding may merely reveal what a complete fool I am still.