Sometimes we say stupid things..

When I was one-and-twenty
I heard a wise man say,
"Give crowns and pounds and guineas
But not your heart away;
Give pearls away and rubies
But keep your fancy free."
When I was one-and-twenty
No use to talk to me.
 
When I was one-and-twenty
Iheard him say again,
"The heart out of the bosom
Was never given in vain;
"Tis paid with sighs a plenty
And sold for endless rue."
And I am two-and-twenty,
And oh, 'tis true, 'tis true.
                          A. E. Housman
Does Housman express rue and remorse for us all?  Indeed! Youth is often the age in which we act rashly and speak without enough forethought because we have not had misfortune strike us yet.  After we have "paid with sighs a plenty," then we consider our words before we sling them into the hearts of others. 
But, friendships and love relationships are like valuable vases.  Once broken, no glue, no mending can prevent our knowing about the break.  We cannot go back; we cannot not know.  So, we must accept the sad consequences of being "two-and-twenty" and strive to live a wiser existence in the future.  "'Tis true, 'tis true."