1 Nephi 15:25

Wherefore, I, Nephi, did exhort them to give heed unto the word of the Lord; yea, I did exhort them with all the energies of my soul, and with all the faculty which I possessed, that they would give heed to the word of God, and remember to keep his commandments always, in all things.—

So I urged them to pay attention to the word of the Lord. I urged them with all the energy of my soul and with all my ability that they would listen to God’s word and remember to obey his commandments always, in all things.

I urged them with everything I had—with all my soul’s energy—to pay attention to God’s word and always remember to keep his commandments in everything.