Love Eternal by H. Rider Haggard

In that atmosphere of perfect bliss Godfrey's cure was quick. For bliss it was, save only that there was another bliss beyond to be attained. Remember that this man, now approaching middle life, had never drunk of the cup of what is known as love upon the earth.

Some might answer that such is the universal experience; that true, complete love has no existence, except it be that love of God to which a few at last attain, since in what we know as God completeness and absolute unity can be found alone. Other loves all have their flaws, with one exception perhaps, that of the love of the dead which fondly we imagine to be unchangeable. For the rest passion, however exalted, passes or at least becomes dull with years; the most cherished children grow up, and in so doing, by the law of Nature, grow away; friends are estranged and lost in their own lives.