Now know I that the LORD saveth his anointed; he will hear him from his holy heaven with the saving strength of his right hand.
Now know I. The people here speak as an ideal person in the singular. Probably in the temple this verse was sung as a solo; the next verse, wherein the plural "we" occurs, was sung as a chorus. From this point the discourse is no more to the king, but of him. The "now" confirms the confident anticipation of faith individually, which had been expressed in the plural "we" more generally, and with a concluding petition, in Psalms 20:5: Now that God hath worked in me the assurance of faith, I not merely think, but 'I know' That the Lord saveth ... hear him from ... holy heaven - literally, 'from the heaven of his holiness.' The "holy heaven" above corresponds to the holy temple or "sanctuary" (Psalms 20:2) below. His holiness secures His faithfulness to His promises (cf. Psalms 11:4). Anti-typically, in the case of Messiah, the Father "heard" the Son when He prayed, "Glorify thy Son;" and in Gethsemane and Calvary (John 17:1; Hebrews 5:7).
Strength. The Hebrew ( gªburowt (H1369)) for "strength" is plural. 'With the saving powers of His right hand:' implying the infinitude of re-sources that God's power possesses.