What we have been taught by parents and teachers is doubtful.
What we are told by neighbours and friends is likely to be mistaken.
Our perception, experience and understanding are not to be trusted.
Common sense is a bit of a joke.
Reason, gut-feelings, mind and heart are all fallible.
Nations are unscrupulous and untrustworthy.
Leaders and politicians all the more so.
Merchants of goods and services are out for our money.
Scientists have a limited and therefore distorted understanding of reality.
Medical professionals test out this distorted understanding of reality on our bodies.
No guru is to be trusted – many are proven charlatans, and about the others, who can say?
Scriptures are not to be trusted; they mostly cause only mischief.
We can rely on nothing, only quietly make our way through life, holding all assumptions up to scrutiny, and not trusting the conclusions we reach.
Language, based on words and verbal associations, is itself inadequate to express anything real; and when left unexpressed, our intimations or reality remain vague and foggy.

We can
Spend a lot of time in silence, just being.
Unravel and reject conditioned responses.
Break down all old connections and imposed patterns.
Reject everything we think we know, see what if anything remains.

There is nothing to be afraid of.
Nothingness itself is not scary, only what we put in it.