this canticle is from the book of the prophet Isaiah, and is found at Isaiah 55:6–11. it is used on friday mornings by the episcopal church.

seek the Lord while he wills to be found;
    call upon him when he draws near.
let the wicked forsake their ways
    and the evil ones their thoughts;
and let them turn to the Lord, and he will have compassion,
    and to our God, for he will richly pardon.
for my thoughts are not your thoughts,
    nor your ways my ways, says the Lord.
for as the heavens are higher than the earth,
    so are my ways higher than your ways,
    and my thoughts than your thoughts.
for as rain and snow fall from the heavens
    and return not again, but water the earth,
bringing forth life and giving growth,
    seed for sowing and bread for eating,
so is my word that goes forth from my mouth;
    it will not return to me empty;
but it will accomplish that which i have purposed,
    and prosper in that for which i sent it.

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