Offer Your Whole Soul as an Offering unto Him

In his old age, before giving the Gold Plates to King Benjamin, Almaleki used the plates to engrave precious keys to obtaining salvation. Joseph Smith translated the engravings as follows:

“…Come unto Christ, who is the Holy One of Israel, and partake of his salvation, and the power of his redemption. Yea, come unto him, and offer your whole souls as an offering unto him, and continue in fasting and praying, and endure to the end; and as the Lord liveth ye will be saved.” (Omni 1:26)

Questions:

-What does it mean to offer your whole soul to Christ?

-How important is our own effort is Christ’s eyes, given that the prophets testify of the importance of enduring to the end after partaking of Christ’s salvation?