Arguna said: But by whom, O descendant of Vrishni! is man impelled, even though unwilling and, as it were, constrained by force, to commit sin? The Deity said: It is desire, it is wrath, born from the quality of passion; it is very ravenous, very sinful. Know that that is the foe in this world. As fire is enveloped by smoke, a mirror by dust, the foetus by the womb, so is this enveloped by desire.