Intellect is a tool of the Self, which uses it for measuring variety. It is not without Self. How could there be manifestations of intellect without its seed existing?
Q. Where are memory and forgetfulness located?
A. In the chitta (intellect).
People like inventors searching for new material inventions make their discoveries in a state of self-forgetfulness. It is in a condition of deep intellectual concentration that this forgetfulness of the ego arises and the invention is revealed. This is also a way of developing intuition. Hence a sharpened concentrated intellect is useful and even essential in material matters, but the revelation or intuition takes its own time to arise and one must await it.

Conscious Immortality