`And I have known, my God, that Thou art trying the heart, and uprightness dost desire; I, in the uprightness of my heart, have willingly offered all these: and now, Thy people who are found here I have seen with joy to offer willingly to Thee.
1 Chronicles 29:15 for sojourners we <FI>are<Fi> before Thee, and settlers, like all our fathers; as a shadow <FI>are<Fi> our days on the land, and there is none abiding.
1 Chronicles 29:16 `O Jehovah our God, all this store that we have prepared to build to Thee a house, for Thy holy name, <FI>is<Fi> out of Thy hand, and of Thee <FI>is<Fi> the whole.
1 Chronicles 29:17 `And I have known, my God, that Thou art trying the heart, and uprightness dost desire; I, in the uprightness of my heart, have willingly offered all these: and now, Thy people who are found here I have seen with joy to offer willingly to Thee.
1 Chronicles 29:18 `O Jehovah, God of Abraham, Isaac, and Israel, our fathers, keep this to the age for the imagination of the thoughts of the heart of Thy people, and prepare their heart unto Thee;
1 Chronicles 29:19 and to Solomon my son give a perfect heart, to keep Thy commands, Thy testimonies, and Thy statutes, and to do the whole, even to build the palace <FI>for<Fi> which I have prepared.'
The verse centers on "known", "thou", "trying", "heart", "uprightness", "dost", and "desire". It is saying that the verse draws attention to "known" and "thou", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 16's "O Jehovah our God all this store..." into verse 18's "O Jehovah God of Abraham Isaac and...", so "known" and "thou" belong inside that flow. In 1 Chronicles context, the local focus is covenant, worship, and faithfulness.
A plain takeaway is to answer the verse's own emphasis on "known" and "thou" with trust shaped by these words, not by a vague optimism outside the passage.