Constancy (Ua Like No More) lyrics

When the dews of the evening are falling
Glistening on the flowers loved so well
Then my heart to thee is calling
From my place within the dell
My heart, oh sweet, is there forever
It thrills with love for thee alone
It's constancy fades never
I'll be ever true to thee, my own
When the dews of the evening are falling
Glistening on the flowers loved so well
Then my heart to thee is calling
From my place within the dell
My heart, oh sweet, is there forever
It thrills with love for thee alone
It's constancy fades never
I'll be ever true to thee, my own

Submitted by Guest

What do you think is the meaning of Constancy (Ua Like No More) by Marty Robbins?