Buddhi evolving from Prakriti and Samkya Karika is clear that Enlightenment is full discrimination between Purusha and Prakriti. To speak that “your buddhi that you need to sharpen” is nonsense.
How can you get to full discrimination of something, before you get to half discrimination of something? How can you get to half discrimination of something, before you get to a quarter discirmination?
To develop such great powers of discrimination that you can discriminate every degree between purusha and prakriti you first need to sharpen that faculty of discirmination. You cannot even discriminate an unheathily obese woman whose mobility is severely compromised from a healthy person.
If somebodies buddhi is working properly they will spot everything. Having a very precise intellect/buddhi leads to a very precise and fine consciousness. You will spot everything. Nobody will be able to pull the wool over your eyes.
I am an intelligent person, it is hard to deceive me. Many have tried to fool me, but I have such a good intellect, I spot it. The BK’s tried - they failed; Sahaja tried - they failed; Anandamarga tried - they failed. Is it because I am stubborn and hold on firmly to my beliefs? No, because even my beliefs cannot deceive me. When my intellect spots errors in my belief, I throw the errors out. I stick to facts always. And the fact here is clear: your guru is a fraud. I can see it loud and clear. You cannot see it, because you cannot spot it. This is why I know you are very low down on the spiritual ladder. In fact more than half of the people reading this thread can spot it. This puts you down even lower.