I said in mine heart, Go to now, I will prove thee with mirth, therefore enjoy pleasure: and, behold, this also is vanity. I will prove thee with mirth - This is well expressed by the author so often referred to. Having tried speculative knowledge in vain, passion and appetite whisper: -
"From the rugged thorny road
Of wisdom, which so ill repays thy toil,
Turn back, and enter pleasure's flowery paths.
Go, take thy fill of joy, to passion give
The reins; nor let one serious thought restrain
What youth and affluence prompt."