expression, noun
God's will; Heaven's will
A reverent expression for divine will, often used in religious or poetic contexts.
すべては神の思し召しだと信じている。
I believe everything is God's will.
思し召し alone is a respectful term for someone's thoughts or wishes, not necessarily divine. 神の思し召し specifically refers to God's will.
Phrase composed of 神 (god) + の (possessive particle) + 思し召し (respectful term for thoughts/wishes). The exact historical derivation is uncertain, but it follows a common pattern for expressing divine will.