With long life will I satisfy him, and shew him my salvation. With long life - Literally, With length of days will I fill him up.
He shall neither live a useless life, nor die before his time. He shall live happy and die happy.
And show him my salvation - ואראהו בשועתי vearehu bishuathi, "I will make him see (or contemplate) in my salvation." He shall discover infinite lengths, breadths, depths, and heights, in my salvation. He shall feel boundless desires, and shall discover that I have provided boundless gratifications for them. He shall dwell in my glory, and throughout eternity increase in his resemblance to and enjoyment of me. Thus shall it be done to the man whom the Lord delighteth to honor; and he delights to honor that man who places his love on him. In a word, he shall have a long life in this world, and an eternity of blessedness in the world to come.
Commentary on the Bible, by Adam Clarke [1831].