An etz tov is not able to produce pri rah nor is an etz nishchat able to produce pri tov.
Verenga chikamu Mattityahu 7
Pakurirana nevamwe
Enzanisa mhando yose: Mattityahu 7:18
Chengetedza mavhesi, verenga usiri pamasaisai, wona mavhidhiyo ezvidzidzo uye zvakawanda!