Notice that “loving-kindness” and “truth” are joined as inseparable attributes of Jehovah in His relation to the chosen race.
For thou hast magnified — i.e., the promise made for help and deliverance has been fulfilled, and more than fulfilled. The psalmist often speaks of Jehovah’s name, or reputation, or honour being at stake. Here the poet can say that the praise won is even beyond what might have been expected. It is true this would have been expressed more in accordance with our expectation by “Thou hast magnified Thy Name above Thy promise;” but comp. Psalms 48:10 for a similar thought, and for the language comp. Tennyson’s:
“I am “become a name.”
The LXX. and Vulg. felt the difficulty too great, and render “Thy holy one,” instead of “Thy word.”