And we wept that one so lovely should have a life so brief;

Farewell is said by the living, in life, every day. It is said with love and friendship, with the affirmation that the memories are lasting if the flesh is not.

my feet will want to walk to where you are sleeping
but
I shall go on living.

Losing people you love affects you. It is buried inside of you and becomes this big, deep hole of ache. It doesn't magically go away, even when you stop officially mourning.

Clown: Good Madonna, why mournest thou?
Olivia: Good Fool, for my brother's death.
Clown:I think his soul is in hell, Madonna.
Olivia:I know his soul is in heaven, Fool.
Clown: The more fool, Madonna, to mourn for your brother's soul being in heaven.

Cordelia! stay a little. Ha! What is't thou say'st? Her voice was ever soft.