My soul breaketh - This word means to break; to crush; to break in pieces by scraping, rubbing, or grating. The idea would seem to be, not that he was crushed as by a single blow, but that his soul - his strength - was worn away by little and little. The desire to know more of the commands of God acted continually on him, exhausting his strength, and overcoming him. He so longed for God that, in our language, "it wore upon him" - as any ungratified desire does. It was not the possession of the knowledge of God that exhausted him; it was the intenseness of his desire that he might know more of God.
For the longing - For the earnest desire.
That it hath unto thy judgments at all times - Thy law; thy commands. This was a constant feeling. It was not fitful or spasmodic. It was the steady, habitual state of the soul on the subject. He had never seen enough of the beauty and glory of the law of God to feel that all the needs of his nature were satisfied, or that he could see and know no more; he had seen and felt enough to excite in him an ardent desire to be made fully acquainted with all that there is in the law of God. Compare the notes at Psalm 17:15.

My soul breaketh - We have a similar expression: It broke my heart, That is heart-breaking, She died of a broken heart. It expresses excessive longing, grievous disappointment, hopeless love, accumulated sorrow. By this we may see the hungering and thirsting which the psalmist had after righteousness, often mingled with much despondency.

My soul breaketh for the longing,.... His heart was just ready to break, and his soul fainted; he was ready to die, through a vehement desire of enjoying the object longed for, after mentioned; "hope deferred makes the heart sick", Proverbs 13:1; the phrase is expressive of the greatness, vehemence, and eagerness of his mind after the thing he desired, which follows:
that it hath unto thy judgments at all times; not the judgments of God on wicked men, though these are desirable for the glorifying of his justice; nor his dark dispensations of providence, though good men cannot but desire and long for the time when these judgments shall be made manifest: but rather the righteous laws and precepts of God are designed, which he desired to have a more perfect knowledge of, and yield a more constant obedience unto; or, best of all, the doctrines of grace and righteousness, that should be more clearly revealed in the times of the Messiah; who was to set judgment in the earth, his Gospel; and to bring in everlasting righteousness, and glorify the justice of God; than which nothing was more earnestly and importunately wished and longed for by Old Testament saints; see Psalm 119:81.

Breaketh - Faints, as it frequently does, when a thing vehemently desired is delayed. Judgments - To a more sound knowledge and serious practice of them.