The first half of the liturgical year ends with the Feast of the Most Holy Trinity, the center of which is the doctrine of one God in three Persons: God is the Father and the Son and the Holy Spirit. On the one hand, this teaching is an attempt to place what God reveals about Himself in His Word within the framework of human understanding. On the other hand, it represents the message that God is immeasurably greater and richer in His nature than man could ever understand or even imagine.

Once Jesus said to Nicodemus, who came to Him secretly at night: “The wind bloweth where it listeth, and thou hearest the sound thereof, but canst not tell whence it cometh, and whither it goeth.” Both Greek and Hebrew use the same word for wind and spirit, in Greek it is “pneuma”, in Hebrew it is “ruach”. In fact, Jesus is not talking about the wind here, but about the Spirit of God; it is not in our power to command or direct Him – the only thing we can do is listen to Him and follow Him.

Before suffering and dying, Jesus made a promise to His disciples: „When the Comforter is come, whom I will send unto you from the Father, even the Spirit of truth, which proceedeth from the Father, he shall testify of me: and ye also shall bear witness, because ye have been with me from the beginning.“

In the original Greek text, the word translated into English as „comforter“ is „parakletos“. This word is used in five places in the New Testament, four times for the Holy Spirit and once for Jesus himself. Namely, Saint John writes in his First Epistle: „My little children, these things write I unto you, that ye sin not. And if any man sin, we have an advocate with the Father, Jesus Christ the righteous: And He is the propitiation for our sins: and not for ours only, but also for the sins of the whole world.“

When we say that God’s Word is like a mirror, it means that through His Word God shows us ourselves exactly as we are. Not only that, but God’s Word also shows us what we should be like according to His will and teaches us what we must do to achieve the goal God has set for us. Above all, living according to God’s will consists of active love of our neighbor and keeping ourselves “unspotted from the world”.

There is still a great deal that we do not know and cannot understand. How do we put the nature of God into human words? It is impossible: our finite mind is incapable of understanding the infinite God. However, we do know something. We know that God – the Supreme Being – must be perfect. And if someone is perfect, then he must also be unchanging. This is exactly what Saint James says in today's Epistle: in God there is “no variableness, neither shadow of turning”.