...ism and Transcendentalism, engaging impartially in controversy on the one hand with Moses Stuart and on the other with George Ripley. The common basis of his opposition to both is his opposition to Plato . Platonism, his researches led him to believe, had in its Neo-Platonic avatar at Alexandria produced, among other doctrines of emanation, the doctrine of the Trinity. Platonism also, believing th...