The cross represents the substitutionary, sacrificial, atoning death of Christ and His subsequent resurrection from the grave. Who is he who condemns? It is Christ who died, and furthermore is also risen, who is even at the right hand of God, who also makes intercession for us. (Romans 8:34)
But God demonstrates His own love toward us, in that while we were still sinners, Christ died for us. (Romans 5:8)
And if Christ is not risen, our faith is futile; you are still in your sins! (1 Cor 15:17)
The Cross used in the logo of our church is the Cross of Triumph because Christ triumphed over sin and death to gain our salvation.
The dove expresses innocence and purity. It also represents the Holy Spirit and the presence of God as hovering over the water at creation. The dove also hovered over Jesus at His baptism.
...And the Spirit of God was hovering over the face of the waters. (Gen. 1:2b)
And the Holy Spirit descended in bodily form like a dove upon Him, and a voice came from heaven which said, "You are My beloved Son; in you I am well pleased." (Luke 3:22)
Fire or flames are often used in the Bible to signify an appearance of God to man. The burning bush in Exodux is an Old Testament example. In Acts 2:3 . . . "tongues of fire" appeared on the heads of the disciples at Pentecost signifying the descent of the Holy Spirit.
And the Angel of the Lord appeared to him in a flame of fire from the midst of a bush. So he looked, and behold the bush was burning with fire, but the bush was not consumed. (Exodus 3:2)
Then there appeared to them divided tongues, as of fire, and one sat upon each of them. And they were all filled with the Holy Spirit and began to speak with other tongues, as the Spirit gave them utterance. (Acts 2:3,4)
The fire represents the presence of God in the life of His people (the church) through the Holy Spirit.
Fire lights up, warms up, purges, and purifies. It is the symbol of the uncompromising God. For our God is a consuming fire.