itthamin this way; mithahor another; atathyama subject matter that is not a fact; a-tat-jnawithout knowledge; bhasitamwhile they were talking; srutvaKrsna hearing them; vicintyathinking; itithus; amrsaactually, truly; mrsayatewho is trying to appear as a false thing (actually the animal was Aghasura, but because of poor knowledge they were thinking him to be a dead python); raksah(Krsna, however, could understand that) he was a demon; viditvaknowing it; akhila-bhuta-hrt-sthitahbecause He is antaryami, situated everywhere, in the core of everyones heart; svanamof His own associates; niroddhumjust to forbid them; bhagavanthe Supreme Personality of Godhead; manah dadhemade up His mind.