Psalms 25:14

“The reason of the blessing explained--the pious enjoy communion with God (compare Pro 3:21, Pro 3:12), and, of course, learn His gracious terms of pardon.”

“The secret - His love and favour, which is called his secret, Job 29:4; Pro 3:32, because it is known to none but him that enjoyeth it. Will shew - He will make them clearly to understand it, both its duties and its blessings; neither of which ungodly men rightly understand. Psalms 25:15”

“secret: Gen 18:17-19; Jer 13:18; Pro 3:32; Mat 13:11, Mat 13:12; Joh 7:17; Joh 14:17, Joh 14:21-23, Joh 15:15, Joh 17:6; Co1 2:14; Eph 1:9, Eph 1:18; Col 3:3; Rev 2:17 he will: etc. or, his covenant to make them know it, Gen 17:13; Deu 4:13; Jer 31:31-34; Rom 11:26, Rom 11:27 Psalms 25:15”

“The lxx renders סוד, κραταίωμα, as though it were equivalent to יסוד. The reciprocal נוסד, Psa 2:2 (which see), leads one to the right primary signification. Starting from the primary meaning of the root סד, "to be or to make tight, firm, compressed," סוד signifies a being closely pressed together for the purpose of secret communication and converse, confidential communion or being together, Psa 89:8; Psa 111:1 (Symm. ὁμιλία), then the confidential communication itself, Psa 55:15, a secret (Aquila ἀπόῤῥητον, Theod. μυστήριον). So here: He opens his mind without any reserve, speaks confidentially with those who fear Him; cf. the derivative passage Pro 3:32, and an example of the thing…”