Psalms 45:10-12 (ESV)
Hear, O daughter, and consider, and incline your ear:
forget your people and your father’s house,
and the king will desire your beauty.
Since he is your lord, bow to him.
The people of Tyre will seek your favor with gifts,
the richest of the people.
Psalm 45 is a song of tribute to the king. We don’t know which king, but it is a song to sing the praises of Israel’s king. That is the immediate context of the song. It is, however, a Messianic song, as well. It is singing praises to the Messiah, the real and, yet future, King of Israel. So, the song is about Jesus.
The above three verses are about the fact that Jesus solicits our commitment and sacrifice and complete loyalty. There is no room in the heart of the believer for anyone else, besides Christ.
Notice what Jesus, Himself, said to His disciples:
Luke 14:33 (ESV)
So therefore, any one of you who does not renounce all that he has cannot be my disciple.
That is pretty demanding. How about this one as well:
Luke 14:26 (ESV)
26 “If anyone comes to me and does not hate his own father and mother and wife and children and brothers and sisters, yes, and even his own life, he cannot be my disciple.
Matthew 10:39 (ESV)
39 Whoever finds his life will lose it, and whoever loses his life for my sake will find it.
Matthew 16:25 (ESV)
25 For whoever would save his life will lose it, but whoever loses his life for my sake will find it.
Mark 8:35 (ESV)
35 For whoever would save his life will lose it, but whoever loses his life for my sake and the gospel's will save it.
Luke 9:24 (ESV)
24 For whoever would save his life will lose it, but whoever loses his life for my sake will save it.
Luke 17:33 (ESV)
33 Whoever seeks to preserve his life will lose it, but whoever loses his life will keep it.
John 12:25 (ESV)
Whoever loves his life loses it, and whoever hates his life in this world will keep it for eternal life.
The king has demands. We are to give Him our complete loyalty.