Hakikat nafs menurut perspektif Ibnu Sina (980-1037 M) dan Imam Al-Ghazali (1058-1111 M) (studi komparatif) = The nature of nafs (soul) according Ibnu Sina's (980 1037M) and Imam Al Ghazali's (1058 1111M) perspective comparative study / Nur Atika Dwi Adjeng