Let us too imitate these men [Prop. David, Apos. Paul & Silas], building a wall around our life with the habit of prayer and letting nothing ever prove an obstacle to us. There is, in fact, nothing that can be an obstacle to us provided we are on the alert. Listen, after all, once more the words of the world’s teacher: ‘In every place raising pure hands in prayer, without anger or conflict’ (1 Tim. 2:8). If you keep your mind purified of improper passions you can, whether you are in the market place, at home, on a journey, appearing in court, at sea, at the hotel or in the workplace – wherever you are, you can call on God and obtain your request.
St. John Chrysostom, Homilies on Genesis, Vol. II.