For some people, there is the fear of incapacity to love. These kinds, no matter how gracious and selfless(in a supposedly romantic relationship), would always see the act of love as an act of God, something grandeur that only the invisible manifest. Not until love is lost and they are shaken with remorse are they able, finally, to pinpoint, saying, 'There, right there, was love' s symbol all along. How could I not have seen it.'
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From @derick45