tasmāt — therefore; śāstram — the scriptures; pramāṇam — evidence; te — your; kārya — duty; akārya — and forbidden activities; vyavasthitau — in determining; jñātvā — knowing; śāstra — of scripture; vidhāna — the regulations; uktam — as declared; karma — work; kartum — do; iha — in this world; arhasi — you should.