Psalms 64:4

“That they may shoot in secret at the perfect, etc.] Meaning himself, who though not without sin, and far from perfection in himself, in the sight of God and with respect to his righteous law, which was exceeding broad; and therefore he saw an end of all perfection, and desired that God would not enter into judgment with him; but yet, in the case of Saul, he was quite clear and innocent, and without fault. Likewise the Messiah, of whom David was a type, may be meant; who has all the perfections of the divine and human nature in him, and is without sin, holy, harmless, pure, and undefiled: and it may be applied to the church and people of God, who, though they are not perfect in themselves,…”

“the perfect--one innocent of the charges made (Psa 18:23). fear not-- (Psa 55:19), not regarding God.”

“That they may shoot in secret - From an unobserved quarter; from a place where they are so concealed that it cannot be known where the arrows come from. There was a purpose to ruin him, and at the same time to conceal themselves, or not to let him know from what source the ruin came. It was not an open and manly fight, where he could see his enemy, but it was a warfare with a concealed foe. At the perfect - At the upright; at one who is perfect so far as his treatment of them is concerned. Compare Psalms 18:20, note; Psalms 18:23, note. Suddenly do they shoot at him - At an unexpected time, and from an unlooked-for quarter. They accomplish what they intended; they carry out their design. And…”

“shoot: Psa 10:8, Psa 10:9; Neh 4:11; Hab 3:14 the perfect: Psa 59:3, Psa 59:4; Joh 19:6; Pe1 2:22, Pe1 2:23 suddenly: Psa 64:7; Sa1 18:11, Sa1 19:10; Sa2 15:14 Psalms 64:5”