Thou triest the heart. — Psalms 11:4; Psalms 7:9; Psalms 26:2.
Hast pleasure in. — 1 Chronicles 28:4; 1 Chronicles 29:3. (Comp. also 1 Chronicles 28:9.)
Uprightness. — Or, sincerity (mêshârîm, Song of Solomon 1:4).
In the uprightness (yôsher), integrity (Deuteronomy 9:5),, a synonym of mêshârîm. Both literally mean straightness: e.g., of a road (Proverbs 2:13; Proverbs 23:31). The connexion of ideas is this: Thou that lookest upon the heart knowest that my offering has been made without grudging and without hypocrisy; my motive was not my own interest, but Thy glory. Hence my joyful thanksgiving, because of the free generosity of Thy people.
Which are present here. — Literally, Who have found themselves here (reflexive verb). (So 2 Chronicles 5:11, and other places.)