The secret of the Lord; either,
1. His word and counsel, to direct and guide them in the right way, which he oft mentions here as a singular blessing, Psalms 25:8,9,12, to show them their duty in all conditions, and the way to their eternal salvation. And so this may seem to be explained by the following words, he will show them his covenant. And this, though it was revealed, yet might be called a secret, because of the many and deep mysteries in it, and because it is said to be hid from many of them to whom it was revealed, Matthew 11:25 2 Corinthians 3:13-15 4:3; and it is not to be understood to any purpose without the illumination of their minds by God's Spirit, as is manifest from Psalms 119:18,19, and many other places of Scripture. Or rather,
2. His love and favour, which is called his secret, Job 29:4 Proverbs 3:32, and that very fitly, because it is known to none but him that enjoyeth it, Proverbs 14:10 Revelation 2:17. Or his gracious and fatherly providence, which is here said to be with them; or, as it is in the Hebrew, towards them, taking care of them, and working for them; even then when God seems to frown upon them. He will show them his covenant, or, and he will make them to know (for the infinitive is here thought to be put for the future tense of the indicative, as it is Ecclesiastes 3:14,15,18 Ho 9:13 12:3) his covenant, i.e. he will make them clearly to understand it, both its duties or conditions, and its blessings or privileges; neither of which ungodly men rightly understand. Or, he will make them to know it by experience, or by God's making it good to them; as, on the contrary, God threatens to make ungodly men to know his breach of promise, Numbers 14:34. Or, as it is in the margin of our Bibles, and his covenant (is, i.e. he hath engaged himself by his promise or covenant) to make them know it, to wit, his secret, i.e. that he will manifest either his word or his favour to them.