A picture is worth 10K words - but only those to describe the picture. Hardly any sets of 10K words can be adequately described with pictures.
A good programming language is a conceptual universe for thinking about programming.
It is better to have 100 functions operate on one data structure than to have 10 functions operate on 10 data structures.
It is easier to change the specification to fit the program than vice versa.
A LISP programmer knows the value of everything, but the cost of nothing.
You think you KNOW when you learn, are more sure when you can write, even more when you can teach, but certain when you can program.