He, too, have child brain, and it is of the child to do what he have done.

The little bird, the little fish, the little animal learn not by principle, but empirically.

And when he learn to do, then there is to him the ground to start from to do more.

'Dos pou sto,' said Archimedes.

'Give me a fulcrum, and I shall move the world!' To do once, is the fulcrum whereby child brain become man brain.