There are two distinct classes of what are called thoughts: those that we produce in ourselves by reflection and the act of thinking and those that bolt into the mind of their own accord.
Thomas PaineThe moral duty of man consists of imitating the moral goodness and beneficence of God, manifested in the creation towards all his creatures. Everything of persecution and revenge between man and man, and everything of cruelty to animals is a violation of moral duty
Thomas Paine