Who said "The poet is a voice for the voiceless."?

This quote is attributed to Seamus Heaney.

The poet is a voice for the voiceless. - Seamus Heaney

"The poet is a voice for the voiceless."

Seamus Heaney

Poet Irish 1939–2013

"Between my finger and my thumb the squat pen rests; snug as a gun."

"Whatever is given can be taken away."

"The main thing is to get the mood right."

"Happiness, I have discovered, is nearly always a rebound from hard work."