 He was educated at Ystalyfera Grammar School, followed by a spell at the University of Wales starting in 1918, where he studied history and philosophy.In 1923 he was elected a Fellow of the university, allowing him to attend Oriel College, Oxford, where he was awarded a DPhil in 1928 for a dissertation entitled "The History and Value of the Distinction between Intellect and Intuition".In 1926 Aaron was appointed a lecturer in the Department of Philosophy at Swansea University.