Henry Wadsworth Longfellow - Memories lyrics

Oft I remember those whom I have known   In other days, to whom my heart was led   As by a magnet, and who are not dead,   But absent, and their memories overgrown With other thoughts and troubles of my own,   As graves with gra**es are, and at their head   The stone with moss and lichens so o'erspread,   Nothing is legible but the name alone. And is it so with them? After long years,   Do they remember me in the same way,   And is the memory pleasant as to me? I fear to ask; yet wherefore are my fears?   Pleasures, like flowers, may wither and decay,   And yet the root perennial may be.