How could reader of the meditations tell he was a Stoic?

There is no work quite like the Meditations in Greek or Roman philosophical literarture.

Readers who come to this book expecting the hardness and austerity of a Stoic will not be disappointed, but they will be surprised by prose that often read like modern peotry and startled by the vivid illustrations that reveals Marcus' deep appreciation of the beauty and purposefulness of the Nature.

Perhaps the sustained analogy to be encountered is, it made possible by discovery of the intimate and indissouble connection between macrocosm and microcosm, between the providence, rationality of the Whole.