C.H. Spurgeons's The Treasury of David
Verse 20. This gate of the LORD, into which the righteous shall enter. Psalmist loves the house of God so well that he admires the very gate thereof, and pauses beneath its arch to express his affection for it. He loved it because it was the gate of the Lord, he loved it because it was the gate of righteousness, because so many godly people had already entered it, and because in all future ages such persons will continue to pass through its portals. If the gate of the Lord's house on earth is so pleasant to us, how greatly shall we rejoice when we pass that gate of pearl, to which none but the righteous shall ever approach, but through which all the just shall in due time enter to eternal felicity. The Lord Jesus has passed that way, and not only set the gate wide open, but secured an entrance for all those who are made righteous in his righteousness: all the righteous must and shall enter there, whoever may oppose them. Under another aspect our Lord is himself that gate, and through him, as the new and living Way, all the righteous delight to approach unto the Lord. Whenever we draw near to praise the Lord we must come by this gate; acceptable praise never climbs over the wall, or enters by any other way, but comes to God in Christ Jesus; as it is written, "no man cometh unto the Father but by me." Blessed, for ever blessed, be this wondrous gate of the person of our Lord.