We think a flower is a fleeting thing, so soon does it change; and yet the human heart is liable to a quicker change than even the flower. A person may be very good one moment, very kind; and the next moment the contrary; calm one moment, and then restless; at one time so affectionate, at another indifferent; all according to the state of mind in which he happens to be at the time. So it cannot last if it is allowed to depend on the beauty of the ideal; such love is dependent and would sooner or later die. That is why so many hearts cannot keep the flame of love alive in them.