1. "The heart prays for eternal life of the consciousness. It knows that there is great good if the consciousness be uninterrupted and passes the ascent untiringly..." [Brotherhood, 576]
2. "One must prepare oneself for constancy in everything. Thence comes indefatigability, thence comes invincibility." [Fiery World III, 486]
3. "An indefatigable spirit is needed to advance along a constant progression." [Fiery World I, 433]
4. "Indefatigability, fearlessness, thirst for knowledge, tolerance and ability for enlightened work – these are the qualities of truth seekers." [In Memory of Maria Tenisheva by Nicholas Roerich]
5. "Pure hearts can show steady support for the Great Service without fatigue or carelessness. How destructive is the dull nature of carelessness! And how many people, even among those who know, are unable to avoid it! In ancient times it was called the “grey serpent.” Let friends adopt the manifestation of vigilance and attentiveness." [Heart, 57]
6. "One should not look back and thus stumble on the stony path. Only forward, untiringly forward! Let each mistake be a stepping stone to a new victory." [Supermundane, 878]
7. "Darkness suppresses and extinguishes every flash of Light, but the warrior of Light is indefatigable, the hand does not get tired in doing, the sacred fire of the heart does not go out. The winner overcomes the darkness. The microcosm of the ascetic spirit burns with its Light, like a lighthouse on a dark night, and shines for everyone." [Facets of Agni Yoga 1952, 612]
