When something is declared as "truth" in the Bible it means it comes from the Lord and is true down to the deepest levels of reality.

1166. In the Word 'Put' or Libya means cognitions drawn from the literal sense, which in a similar way confirm false assumptions. 'Put' also means simply such cognitions. This is clear from places quoted already where Cush is referred to. Because Cush too means cognitions, though interior ones, Put and Cush are mentioned together in the Word. Among the places quoted above, see Jeremiah 46:9; Ezekiel 30:4-6; Nahum 3:9; Daniel 11:43.