“Then write this to the angel of the Church in Laodicea: ‘These are the words of the Amen, the faithful and true witness, the beginning of God’s creation: I know what you have done, and that you are neither cold nor hot. I could wish that you were either cold or hot! but since you are lukewarm and neither hot nor cold, I intend to spit you out of my mouth! While you say, ‘I am rich, I have prospered, and there is nothing that I need’, you have no eyes to see that you are wretched, pitiable, poverty-stricken, blind and naked.

My advice to you is to buy from me that gold which is purified in the furnace so that you may be rich, and white garments to wear so that you may hide the shame of your nakedness, and salve to put on your eyes to make you see. All those whom I love I correct and discipline. Therefore, shake off your complacency and repent. See, I stand knocking at the door. If anyone listens to my voice and opens the door, I will go into his house, and dine with him, and he with me. As for the victorious, I will give him the honour of sitting beside me on my throne, just as I myself have won the victory and have taken my seat beside my Father on his throne. Let the listener hear what the spirit says to the Churches.” Revelation 3:14-22
What was making the church neither hot nor cold? In verse 17 Jesus explains that it was because of their love of money they said "I am rich and have become wealthy and I have need of nothing. They thought that because of their wealth no one would judge them as sinners because people would think that God was blessing them because they were righteous. Hosea 12:8
For men who set their hearts on being wealthy expose themselves to temptation. They fall into one of the world’s traps, and lay themselves open to all sorts of silly and wicked desires, which are quite capable of utterly ruining and destroying their souls. For loving money leads to all kinds of evil, and some men in the struggle to be rich have lost their faith and caused themselves untold agonies of mind. 1 Timothy 6:10
“No one can be loyal to two masters. He is bound to hate one and love the other, or support one and despise the other. You cannot serve God and the power of money at the same time.” Matt 6:24
Their love of money had replaced their love of the Lord. Because of their wealth they rejected Jesus himself so they lost their first love. Jesus describes them as being wretched, miserable, poor, blind and naked. Why?
Because they had forgotten what he said.
‘You shall love the Lord your God with all your heart, with all your soul, and with all your mind’. This is the first and great commandment. And there is a second like it: ‘You shall love your neighbour as yourself’. The whole of the Law and the Prophets depends on these two commandments.” Matt 22:37-40
Verse 18 Jesus advises the church to buy from him gold that has been refined in fire. What is this gold? It is a treasure that is pure are free of all impurities. The Holy Spirit.
“I have said all this while I am still with you. But the one who is coming to stand by you, the Holy Spirit whom the Father will send in my name, will be your teacher and will bring to your minds all that I have said to you. John 14:25-26
All who follow the leading of God’s Spirit are God’s own sons. Nor are you meant to relapse into the old slavish attitude of fear—you have been adopted into the very family circle of God and you can say with a full heart, “Father, my Father”. The Spirit himself endorses our inward conviction that we really are the children of God. Think what that means. If we are his children we share his treasures, and all that Christ claims as his will belong to all of us as well! Yes, if we share in his suffering we shall certainly share in his glory. Romans 8:14-17