My Servant: i.e. Messiah. See note on Isaiah 37:35.
My soul. I Myself. Hebrew. nephesh. App-13.
delighteth. is well-pleased.
put. bestowed.
My spirit. Hebrew. ruach (App-9). Here is the doctrine of the Trinity: (1) The Father, the speaker; (2) My "Servant", the Messiah, the Son; and (3) My Spirit. See note on "stretched out" in Isaiah 42:5.