Adam Clarke on Psalms 49:4

I will incline mine ear to a parable - This was the general method of conveying instruction among the Asiatics. They used much figure and metaphor to induce the reader to study deeply in order to find out the meaning. This had its use; it obliged men to think and reflect deeply; and thus in some measure taught them the use, government, and management of their minds.

My dark saying upon the harp - Music was sometimes used to soothe the animal spirits, and thus prepare the mind for the prophetic influx.