en_tn_lite_do_not_use/mrk/12/30.md

with all your heart, with all your soul, with all your mind, and with all your strength

Here "heart" and "soul" are metonyms for a person's inner being. These four phrases are used together to mean "completely" or "earnestly." (See: rc://en/ta/man/translate/figs-metonymy and rc://en/ta/man/translate/figs-doublet)