Oswald Chambers (2010). “Christian Disciplines: Building Strong Christian Character through Divine Guidance, Suffering, Peril, Prayer, Loneliness, and Patience”, p.158, Discovery House
Mahatma Gandhi (1965). “Glorious Thoughts of Gandhi: Being a Treasury of about Ten Thousand Valuable and Inspiring Thougths of Mahatma Gandhi, Classified Under Four Hundred Subjects”