1. "Stand firm, stand more firmly than a rock. The miraculous fire is intensified by steadfastness of spirit." [Fiery World I, 68]
2. "Bones and muscles can be broken, but the spirit is unbreakable!" [Brotherhood, 18]
3. "Life is very complicated, and only the consciousness that is merged with the Higher Will can see the right direction and guide its ship through all the storms, but storms are inevitable and useful both for the ship and for the helmsman and the whole crew, because only in this way fearlessness, firmness, resourcefulness and endurance are tested and tempered." [Letters of Helena Roerich in 9 Volumes - 2. 078]
4. "Give the light of a steady, evenly burning flame of the spirit, without which all your achievements are reduced to zero. The strength of the chain is measured by the weakest link, the fortitude of the spirit is measured by the moments of its damage." [Facets of Agni Yoga 1954, 664]
5. "Right thinking produces stability, which is the first requirement [of harmonization]. Steadfastness expels duplicity, fear and doubt." [Fiery World III, 112]
6. "But under all circumstances, one condition is necessary, namely, the fortitude or steadfastness of the spirit. We must stand firm, no matter what happens around. The stronghold inside must be found and affirmed." [Facets of Agni Yoga 1954, 353]
7. "Thought easily obeys the will when thought is guided by the heart. Therefore, feeling is stronger than the activity of the intellect, and love achieves what cannot be achieved by the brain. A steadfast heart makes will and the brain stable." [Facets of Agni Yoga 1955, 19]
8. "One who is patient will also have courage and endurance." [Supermundane, 548]
9. "Psychic or life-giving energy develops and increases only with its constant and rhythmic application, but its convulsive manifestations lead to nothing and are even destructive. That's why all busy and active people are very hardy and durable. Therefore, we will not be afraid of being overloaded, but we will try to observe a certain rhythm and find peace in all our actions." [Letters of Helena Roerich in 9 Volumes - 5. 123]
10. "We know many cases when physically weak people, but strong in spirit, turned out to be stronger than the ones with healthy, well-fed and strong bodies, and showed miracles of fortitude and endurance purely physical. Not the muscles, but the spirit shows heroism. ...Let's apply the measures of the spirit to everything. The body is only the executor of its orders." [Facets of Agni Yoga 1955, 511]
11. "After inspecting his army Akbar said, “A fourth of what we have to do has been achieved, for I have seen well-fed men. The rest we shall see after a day of intense heat, after a day of rain, and after a sleepless night.”" [Leaves of Morya’s Garden II, 310]
12. "Fortitude follows from a great balance. ...Fortitude will always have something to do with the concept of responsibility and duty. Fortitude will not get carried away, will not slip, will not stagger. In those who walked firmly until the last hour, there was always fortitude." [Fortitude by Nicholas Roerich]
