matthew 3:17 And lo a voice from heaven, saying, This is my beloved Son, in whom I am well pleased. - Free Bible Online

      17. And lo a voice from heaven, saying, This is--Mark and Luke give it in the direct form, "Thou art." (Mr 1:11; Lu 3:22).
      my beloved Son, in whom I am well pleased--The verb is put in the aorist to express absolute complacency, once and for ever felt towards Him. The English here, at least to modern ears, is scarcely strong enough. "I delight" comes the nearest, perhaps, to that ineffable complacency which is manifestly intended; and this is the rather to be preferred, as it would immediately carry the thoughts back to that august Messianic prophecy to which the voice from heaven plainly alluded (Isa 42:1), "Behold My Servant, whom I uphold; Mine Elect, IN WHOM MY SOUL DELIGHTETH." Nor are the words which follow to be overlooked, "I have put My Spirit upon Him; He shall bring forth judgment to the Gentiles." (The Septuagint perverts this, as it does most of the Messianic predictions, interpolating the word "Jacob," and applying it to the Jews). Was this voice heard by the by-standers? From Matthew's form of it, one might suppose it so designed; but it would appear that it was not, and probably John only heard and saw anything peculiar about that great baptism. Accordingly, the words, "Hear ye Him," are not added, as at the Transfiguration.

JFB.