That which is lacking in the present world is a profound knowledge of the nature of things.

...Blessed be the heart who finds its way to the eternal summer. - where grateful happiness is found through understanding that whatever your situation is, it could always be worse, but isn't... and the thought that things could always be better and the bitter unhappiness this creates is discarded!

...blessed be the heart who finds its way to the eternal summer. [...to the realisation of eternal gratitude that things aren't worse, because they always can be!]