Luke 9

Luke 9:24

For whosoever will save his life shall lose it: but whosoever will lose his life for my sake, the same shall save it.

Cross reference-
D&C 103: 27&28-
27  Let no man be afraid to lay down his life for my sake; for whoso layeth down his life for my sake shall find it again.
28  And whoso is not willing to lay down his life for my sake is not my disciple.

Luke 3

Luke 3:22

And the Holy Ghost descended in a bodily shape like a dove upon him, and a voice came from heaven, which said, Thou art my beloved Son; in thee I am well pleased.

The Godhead are 3 distinct individuals. God the Father, Jesus Christ and the Holy Ghost. They are one in purpose. As members of the Church of Jesus Christ of Latter-day Saints we believe this to be so- Joseph Smith saw the Father and the Son, as separate personages, in a vision in the sacred grove.