How does Macbeths characteristics develop

A final point worth noting is Macbeth's reported inability to answer "Amen" to a solemn prayer to God. Shakespeare's post-medieval world still strictly adhered to the binary opposition between the divine and the occult, or to put it in more ecclesiastic terms, between Christ and Satan. The belief went that Satanic forces would not, or could not pay homage to Christ. Thus, Macbeth's inability to answer "Amen" reflects his debasement, sinking to the ranks of …

…the daggers back, put them with the grooms, and smear the grooms with blood, so it will look like the grooms killed the King. She takes the daggers from him and tells him that it's childish to be afraid of the sleeping or the dead. And she's not afraid of blood, either. She says, "If he [King Duncan] do bleed, / I'll gild the faces of the grooms withal / For it must seem their guilt" (2.2.52-54)