Here "my heart" refers to the inner being of the writer. AT: "I am always thinking about your laws within my inner being" (See: [[rc://en/ta/man/translate/figs-metonymy]])
This refers to the good news that God rescues his people. AT: "good news that because you are righteous, you rescue your people" (See: [[rc://en/ta/man/translate/figs-ellipsis]])
Here "my lips" represents the writer, emphasizing his speech. AT: "I have not stopped myself from proclaiming these things" (See: [[rc://en/ta/man/translate/figs-metonymy]])