Hebrews 4:16

come--rather as Greek, "approach," "draw near." boldly--Greek, "with confidence," or "freedom of speech" (Eph 6:19). the throne of grace--God's throne is become to us a throne of grace through the mediation of our High Priest at God's right hand (Heb 8:1; Heb 12:2). Pleading our High Priest Jesus' meritorious death, we shall always find God on a throne of grace. Contrast Job's complaint (Job 23:3-8) and Elihu's " IF," &c. (Job 33:23-28). obtain--rather, "receive." mercy--"Compassion," by its derivation (literally, fellow feeling from community of suffering), corresponds to the character of our High Priest "touched with the feeling of our infirmities" (Heb 4:15). find grace--corresponding to "throne of grace." Mercy especially refers to the remission and removal of sins; grace, to the saving bestowal of spiritual gifts [ESTIUS]. Compare "Come unto Me . . . and I will give you rest (the rest received on first believing). Take My yoke on you . . . and ye shall find rest (the continuing rest and peace found in daily submitting to Christ's easy yoke; the former answers to "receive mercy" here; the latter, to "find grace," Mat 11:28-29). in time of need--Greek, "seasonably." Before we are overwhelmed by the temptation; when we most need it, in temptations and persecutions; such as is suitable to the time, persons, and end designed (Psa 104:27). A supply of grace is in store for believers against all exigencies; but they are only supplied with it according as the need arises. Compare "in due time," Rom 5:6.

— Jamieson-Fausset-Brown Commentary (public domain)