Puasa (Kajian Eksegetis Menurut Kitab Zakharia 7 : 1 - 14 dan Relevansinya Bagi Tindakan Diakonia Gereja: Fasting (Exegetical Study According To Zechariah 7:1-14 And Its Relevance For The Diakonic Action Of The Church) (Sekolah Tinggi Filsafat Teologi GKI)