One can acquire certainty only by amputating inquiry.
Speed is what distinguishes intelligence. No bird discovers how to fly: evolution used a trillion bird-years to 'discover' that – where merely hundreds of person-years sufficed.
You don't understand anything unless you understand there are at least 3 ways.
Listening to music engages the previously acquired personal knowledge of the listener.
Will robots inherit the earth? Yes, but they will be our children.
In science, one learns the most by studying what seems to be the least.