Abba Pambo’s answer to the question can be found in the online Prologue of Ohrid, on July 18th, Old Calendar (July 31st, New). From the material, read the selection regarding the Venerable Pambo (†386), the Venerable Paisius and Isaiah, and also the Reflection. To read online, click here: July 31st (New Style) • July 18th (Old Style)
Of course, all the materials for the day would be most edifying as well. The Prologue of Ohrid is an outstanding source on the lives of the Eastern Orthodox Christian Saints commemorated on each day of the year; it also includes a daily reflection, a contemplation, a homily, and a concluding prayer. A written copy of the Prologue also includes a hymn. The online version includes icons.
The online version has been graciously provided by the St. Sergius Publishing House of the Western American Diocese of the Serbian Orthodox Patriarchate. To access site, click here: St. Sergius Publishing House
The Prologue was compiled and composed by St. Nikolai Velimirovic †1956 (for his story, click here: Orthodox Wiki: Saint Nikolaj Velimirović )
For more from Abba Pambo click here: St Pambo of Nitria, Abbot A.D. 385