Ecclesiastes 2:11 is one of the most honest assessments of career exhaustion in Scripture: "Then I looked on all the works that my hands had wrought, and on the labour that I had laboured to do: and, behold, all was vanity and vexation of spirit, and there was no profit under the sun." The Hebrew hebel — 'vanity' — literally means breath, vapor, something that disappears. The Preacher had accomplished extraordinary things and found the accomplishment hollow. This is not pessimism — it is the accurate diagnosis of a life organized around career achievement as its primary meaning.
The Sabbath principle in Exodus 20:8–11 is grounded theologically in what God did: "in six days the LORD made heaven and earth...and rested the seventh day." Rest is not a recovery technique. It is built into the structure of creation. The person whose career has exhausted them has often violated the Sabbath rhythm — not just skipping one day a week but losing the orientation that rest is not something you earn by finishing, it is something built into the design.
Commentary is from a charismatic Protestant perspective, drawing on KJV text and public-domain sources including Spurgeon, Andrew Murray, and Matthew Henry.