Ecclesiastes 1:2 declares 'Vanity of vanities, all is vanity,' reflecting the futility of life under the sun. Romans 8:20-21 speaks of creation being subjected to futility, but with hope of liberation through Christ.
Ecclesiastes 1:9 states 'there is nothing new under the sun,' which is echoed in 2 Peter 3:4 where scoffers claim that all things continue as they were from the beginning.
Ecclesiastes 1:14 observes that all is vanity and a striving after wind, similar to James 4:14 which describes life as a vapor that appears for a little time and then vanishes.
Ecclesiastes 1:18 states that with much wisdom comes much sorrow. 1 Corinthians 1:18-21 contrasts worldly wisdom with the wisdom of God, which is seen as foolishness to the world but is the power of God.