yet to
Examples
What is a weed? A plant whose virtues have yet to be discovered.
The wisest mind has something yet to learn.
I have yet to see any problem, however complicated, which, when you looked at it in the right way, did not become still more complicated.
It has yet to be proven that intelligence has any survival value.
Better is the evil known than the good which is yet to know.
To know and not do is not yet to know.