The middle-aged, who have lived through their strongest emotions, but are yet in the time when memory is still half passionate and not merely contemplative, should surely be a sort of natural priesthood, whom life has disciplined and consecrated to be the refuge and rescue of early stumblers and victims of self-despair.
There are no more uses of "consecrate" in the book.
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The priest consecrated the chapel.
But, in a larger sense, we can not dedicate — we can not consecrate — we can not hallow — this ground. The brave men, living and dead, who struggled here, have consecrated it, far above our poor power to add or detract. The world will little note, nor long remember what we say here, but it can never forget what they did here.