Love, grammatically and philosophically, remains an abstract concept. Yet the concrete aspect of love is markedly seen when tested with negation or rejection. The litmus test of love perhaps is when one loves another and is not loved in return. Love sincere will not wilt or cease even when unreciprocated. True love will have the strength to let go of what it loves even if the other cannot love in return, but it cannot cease to love.
True love is not angelic or pure. It can be subject to occurrence but non- recurrence of betrayal, humiliation but shall define grudges a human lapse. True love, not mutual will hold both memory of the unique and pain of the unrequited, but shall never fail to survive until the last breath. True love holds the strength to acknowledge that you love someone for a lifetime, the acceptance that you will not be loved in return, and the faith that the love shall never cease.
Love ,true and sincere may not be successful, may not be mutual, may not be reciprocal but it shall last a lifetime.