Solomon
Proverbs 15:19ESV·traditional attribution

The way of a sluggard is like a hedge of thorns, but the path of the upright is a level highway.

Matthew Henry Presbyterian @wholebiblehenry

See here, 1. Whence those difficulties arise which men pretend to meet with in the way of their duty, and to be insuperable; they arise not from any thing in the nature of the duty, but from the slothfulness of those that have really no mind to it.

John Gill Reformed Baptist @doctorgill

The way of the slothful man is as an hedge of thorns,.... Or, "strewed with thorns", as the Septuagint and Arabic versions; the Targum is, "the ways of the slothful are briers and thorns.'' Either really being made so by his own conduct; who, by his slothfulness, has implicated and entangled himself in such difficulties, that he cannot extricate himself; his way is not passable...

Jamieson-Fausset-Brown Reformed @jfbcommentary

The difficulties of the slothful result from want of energy; the righteous find a plain [and open] way--literally, "a highway," by diligence (Sa1 10:7; Psa 1:3).