Answer:
In the poem "Heaven", Echo says that light, joy, and leisure will last.
Step-by-step explanation:
"Heaven" is a poem by George Herbert. It is supposed to represent, in a satirical manner, a conversation between man and God. While man asks questions, Echo - which is physically explained as a reflection of sound that arrives at the listener with a delay after the direct sound - "answers" them by repeating the last syllables of each utterance.
To the questioning man, it sounds as if his questions are being answered by God, since God wouldn't hesitate; He alone can answer questions without thinking. We humans should be more careful though, taking responsibility for what we say.
Toward the end of the poem, Echo ends up repeating syllables that form the words light, joy, and leisure. It also "says" they will last forever - or, at least, that's how the man chooses to understand it:
Then tell me, what is that supreme delight?
Echo Light
Light to the minde: what shall the will enjoy?
Echo Joy
But are there cares and business with the pleasure?
Echo Leisure
Light, joy and leisure; but shall they persever?
Echo Ever)