At that season, answering, Jesus said,
"I am acclaiming Thee, Father,
Lord of heaven and earth,
for Thou hidest these things from the wise
and intelligent and Thou dost reveal them
to minors. Yea, Father,
seeing that thus it became a delight in front of Thee.
(Mt 11:25,26, CLV)
A lord has authority over something, be it slaves or a piece of land. Whatever the lord pleases he may do with whatever he has authority over. This is the simple meaning of the word lord, even in the Greek language.
Jesus declares that His Father is Lord of heaven and earth. Heaven (sing.), the visible atmosphere around the earth, earth, that on which we walk and live. Now God is the owner of both, and He may do with it as it pleases Him.
God's Lordship over heaven and earth goes even so far that He has total control over those walking on it. He locks up comprehension. He hides. Those who had heard Jesus speaking about the kingdom did only those understand to whom God intended to reveal it. None else! Jesus Himself confirms this simple truth. Can we grasp it? Can we believe it? Can we fully acknowledge that even Judas went against Messiah because God made him to? Too hard to believe? Or that all that were involved in the assassination of our dear and innocent Lord Jesus Christ acted in accord with our Creator's counsel? Too hard to believe? Read Acts 4:27,28:
both Herod and Pontius Pilate, together with the nations and the peoples of Israel, [...] do whatever Thy hand and Thy counsel designates beforehand to occur.
Amazing indeed! None of the events recorded by Matthew, Mark, Luke, and John were anywhere outside of God's hand. Everything was designated before to occur. Truly, God is in charge! God does as it pleases Him with His creation!
The LORD hath made all things for himself: yea, even the wicked for the day of evil. (Prov16:4)
Yahweh, I know that the way of man is not in himself: it is not in man who walks to direct his steps. (Jer 10:23)
All the inhabitants of the earth are reputed as nothing; and he does according to his will in the army of heaven, and among the inhabitants of the earth; and none can stay his hand, or tell him, What do you? (Dan 4:35)
For he said to Moses, “I will have mercy on whom I have mercy, and I will have compassion on whom I have compassion.” So then it is not of him who wills, nor of him who runs, but of God who has mercy. (Ro 9:15,16)