When you light a fire, a flame leaps forth and gives light. Fire and light are sometimes mistaken for one another.

But when we speak of fire, we are referring to the cause, and light is a consequence – there is no light without fire. But what fire is in itself we do not know.

We can only know it through its two manifestations: heat and light.
The Holy Trinity is one of the symbolic representations of the great mystery of fire. Fire is the Father.

And from the Father proceed the Son – the Christ – which is light or wisdom, and the Holy Spirit, which is heat or love.
Omraam Mikhaël Aïvanhov