the Precept (Principle)
1 Peter 2:2
As newborn babes, desire the sincere milk of the word, that ye may grow thereby.
the Promise (from God)
Psalm 132:15
I will abundantly bless her provision: I will satisfy her poor with bread.
our Prayer (to God)
Psalm 119:169
Let my cry come near before Thee, O Lord: give me understanding according to Thy word.
Take each Precept and Promise and Prayer and pray them back to the Lord as one prayer
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NOTE: I hope this is unnecessary to say, but to have a prepared heart requires time in the Word.