Gayatri mantra is a Vedic prayer. It is a universal prayer that can be used by any person, belonging to any country, irrespective of race, religion, or sex. This book includes the symbolism of Om and the Gayatri, the scriptural references where they are mentioned, as well a detailed instruction on how to perform the Sandhya rituals. Text for the rituals is in Sanskrit with transliteration, and English translation.
The disciple must have great power of endurance. Bear all evil and misery without one thought of unhappiness, resistance, remedy, or retaliation. That is true endurance, and that you must acquire.
-Swami Vivekananda