Psalms 25:10

All the paths of the LORD [are] mercy and truth unto such as keep his covenant and his testimonies.

Ver. 10. All the paths of the Lord are mercy and truth] All the passages and proceedings, both ordinantial and providential, whereby he cometh and communicateth himself to his people, are not only mercy (though that is very sweet), but truth; they come to them in a way of a promise from God, as bound to them by covenant; this is soul-satisfying indeed; this turns all that a man hath to cream, when every mercy is a present sent him from heaven by virtue of a promise.

Unto such as keep his covenant and his testimonies] i.e. His law (that singular testimony of his goodness towards them), called a covenant, because he bargaineth with us, as it were, that we should keep it; which because we can never do, he undertaketh to perform his own part and ours too. Lex iubet, gratis iuvat, he worketh all our works in us, and for us; he giveth us to be what he biddeth us to be: this is the everlasting covenant, and the fruits of it are sure mercies, compassions that fail not.