This quote is from William Shakespeare's play "Love's Labour's Lost".
The quote suggests that if one has a light heart, they are able to live a long and pleased life. This is because having a light heart enables one to let go of their worries and take pleasure in life without tension or stress and anxiety, which can reduce one's life expectancy. The extract in which it is positioned can be translated as one huge joke, with the characters teasing each other and cracking jokes to lighten the mood, which would indicate that they all have light hearts.
"At the heart of the Reggio Emilia approach is the belief that children are full of potential, competent, and capable of constructing their own learning"
