What is a weed? A plant whose virtues have yet to be discovered. Ralph Waldo Emerson
The wisest mind has something yet to learn. George Santayana
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. Poul Anderson
It has yet to be proven that intelligence has any survival value. Arthur C. Clarke
Better is the evil known than the good which is yet to know. Danish Proverb
To know and not do is not yet to know. Zen Proverb