The trade of authorship is a violent, and indestructible obsession.
— George Sand

In theory there is a possibility of perfect happiness: To believe in the indestructible element within one, and not to strive towards it.
Franz Kafka indestructible quote

Fatalism, whose solving word in all crises of behavior is All striving is vain, will never reign supreme, for the impulse to take life strivingly is indestructible in the race. Moral creeds which speak to that impulse will be widely successful in spite of inconsistency, vagueness, and shadowy determination of expectancy. Man needs a rule for his will, and will invent one if one be not given him.
— William James

Christ's grave was the birthplace of an indestructible belief that death is vanquished and there is life eternal.
— Adolph Harnack

For the first time, we saw our world, not as a solid, immovable, kind of indestructible place, but as a very small, fragile-looking world just hanging against the blackness of space.
— Brian Cox