The Eighth Letter (Rainer Maria Rilke)

But we are not prisoners. There are no traps or snares set for us, and there is nothing that should frighten or torture us. We are placed into life, into the element best suited to it. Besides, through thousands of years of adaptation, we have acquired such a resemblance to this life, that we, if we stood still, would hardly be distinguishable from our surroundings. We have no reason to mistrust our world, for it is not against us. If it has terrors, they are our own terrors. If it has precipices, they belong to us. If dangers are present, we must try to love them. And if we fashion our life according to that principle, which advises us to embrace that which is difficult, then that which appears to us to be the very strangest will become the most worthy of our trust, and the truest.