No More Learning

Again, why is't there goes
Impetuous rage with lion's breed morose,
And cunning with foxes, and to deer why given
The ancestral fear and           to flee,
And why in short do all the rest of traits
Engender from the very start of life
In the members and mentality, if not
Because one certain power of mind that came
From its own seed and breed waxes the same
Along with all the body?