This passage is properly regarded as the Epilogue of the whole book; a kind of apology for the obscurity of many of its sayings. The passage serves therefore to make the book more intelligible and more acceptable.

Here, as in the beginning of the book Ecclesiastes 1:1-2, the Preacher speaks of himself Ecclesiastes 12:8-10 in the third person. He first repeats Ecclesiastes 12:8 the mournful, perplexing theme with which his musings began Ecclesiastes 1:2; and then states the encouraging practical conclusion Ecclesiastes 12:13-14 to which they have led him. It has been pointed out that the Epilogue assumes the identity of the Preacher with the writer of the Book of Proverbs.

Ecclesiastes 12:8 Parallel Commentaries

Obedience to God the Way to Faith in Christ.
"When Jesus saw that he answered discreetly, He said unto him, Thou art not far from the kingdom of God."--Mark xii. 34. The answer of the scribe, which our blessed Lord here commends, was occasioned by Christ's setting before him the two great commandments of the Law. When He had declared the love of God and of man to comprehend our whole duty, the scribe said, "Master, Thou hast said the truth: for there is one God; and there is none other but He: and to love Him with all the heart, and with …
John Henry Newman—Parochial and Plain Sermons, Vol. VIII

The Christian Man
Scripture references: Genesis 1:26-28; 2:7; 9:6; Job 33:4; Psalm 100:3; 8:4-9; Ecclesiastes 7:29; Acts 17:26-28; 1 Corinthians 11:7; Ephesians 4:24; Colossians 3:10; 1 Corinthians 15:45; Hebrews 2:6,7; Ephesians 6:10-18; 1 Corinthians 2:9. WHAT IS MAN? What Shall We Think of Man?--Who is he? What is his place on the earth and in the universe? What is his destiny? He is of necessity an object of thought. He is the subject of natural laws, instincts and passions. How far is he free; how far bound? …
Henry T. Sell—Studies in the Life of the Christian

The Heavenly Footman; Or, a Description of the Man that Gets to Heaven:
TOGETHER WITH THE WAY HE RUNS IN, THE MARKS HE GOES BY; ALSO, SOME DIRECTIONS HOW TO RUN SO AS TO OBTAIN. 'And it came to pass, when they had brought them forth abroad, that he said, Escape for thy life; look not behind thee, neither stay thou in all the plain: escape to the mountain, lest thou be consumed.'--Genesis 19:17. London: Printed for John Marshall, at the Bible in Gracechurch Street, 1698. ADVERTISEMENT BY THE EDITOR. About forty years ago a gentleman, in whose company I had commenced my …
John Bunyan—The Works of John Bunyan Volumes 1-3