Complex sentence: Diogenes Laërtius, vii.181, x.26--7 He was considered diffuse and obscure in his utterances and careless in his style, but his abilities were highly regarded, and he came to be seen as a preeminent authority for the school.
Split into simpler sentences: Diogenes Laërtius, vii.181, x.26--7 He was considered diffuse and obscure in his utterances and careless in his style. But his abilities were highly regarded, and he came to be seen as a preeminent authority for the school.