From eternity the oath is spoken.  The Holy Son asks by the ministry he is sent to accomplish.

Every word of every prayer is the fruit of a perfectly earnest life.  By this the Lord Jesus lives the answer to his own prayers.  How shall the eternal Father in Heaven not give his own flawless will?

From the birth of the Son to the holy words spoken, “It is finished”, the Holy Son lives his prayer.

7 I will proclaim the Lord’s decree:

He said to me, “You are my son;
today I have become your father.
8 Ask me,
and I will make the nations your inheritance,
the ends of the earth your possession.
9 You will break them with a rod of iron;
you will dash them to pieces like pottery.”

Often the prayers of men are naught but words.  And in this they take stabbing guesses at the Holy will of the Living God.

But the life of earnest obedience produces effective prayers on its own.  As the fruit tree does not strain to produce what it is made to produce, so the obedient servant of Christ Jesus is made effective.

By His Grace