Charles Spurgeon Commentary Hebrews 1:4-5

"having become by so much better than the angels, as he hath inherited a more excellent name than they. For unto which of the angels said he at any time, Thou art my Son, This day have I begotten thee? and again, I will be to him a Father, And he shall be to me a Son?" — Hebrews 1:4-5 (ASV)

They are servants, but they are not sons; they are created, but they are not begotten. You see what he says to the Son – I will be to him a Father, and he shall be to me a Son.