King Lear - play with feeling

I saw King Lear in Adelaide the other night at Festival Theatre. The play was performed by the State Theatre Company and John Gaden played Lear. Gloucester was also brilliantly played. These two white bearded and old-enough actors were brilliant in their roles, conveying the frailty that comes with age and others' reaction to age. In the play, age is like walking a tightrope, being observed by an audience looking for false (perhaps fatal) moves. So the play is about, I now think - don't know what I thought it was about when I studied it at university years ago - old age and relationships with children, once those children are adults. Love and its changing nature in other words. It was very moving. The ad for the play has the line 'Be careful who you listen to' and certainly the two old men Lear and Gloucester seemed to be poor judges of character, but like all of Shakespeare's tragedies there is a considerable amount of conspiracy to wade through. Hopefully normal life is not like that but who knows? Loyalty and love, played by Cordelia (Lear's daughter) and Edgar (Gloucester's son) was very heart melting. One of the last lines was (in modern day English):
Speak what we feel , not what we ought to say
Good advice from Will who was about 40 at the time, about 10 years from his own death not in his 80s as with Lear but at 52.
Modern-day wise, there are many children who seemingly betray their parents by putting them in nursing homes and not giving them a return of care for what they received themselves in childhood, so it will be hard for many to view this play without thinking of their relationship with their own parents, whether happy or sad.