greek

What meaning does the preposition πρὸς really convey in John 1:1?

John 1:1 reads as follows:

Ἐν ἀρχῇ ἦν ὁ λόγος, καὶ ὁ λόγος ἦν πρὸς τὸν Θεόν, καὶ Θεὸς ἦν ὁ λόγος.

I’m wondering about the “πρὸς τὸν Θεόν”, translated as “with god.”

But, I’m more asking about the connotative meaning of the word, or the spectrum of meaning it has, other than “with”. What is the author trying to say about the relation between the λόγος and the Θεὸς?

In 1 Corinthians 14:15, what is the difference between praying «τῷ πνεύματι» versus «τῷ νοΐ»?

In 1 Cor. 14:15, it is written,

15 What is the outcome then? I will pray with the spirit and I will pray with the mind also; I will sing with the spirit and I will sing with the mind also. NASB

ΙΕʹ τί οὖν ἐστιν προσεύξομαι τῷ πνεύματι προσεύξομαι δὲ καὶ τῷ νοΐ ψαλῶ τῷ πνεύματι ψαλῶ δὲ καὶ τῷ νοΐ TR, 1550

What, if any, is the difference between praying «τῷ πνεύματι» (NASB: “with the spirit”) versus «τῷ νοΐ» (NASB: “with the mind”)? Or, is the apostle Paul using a parallelism thus equating the πνεῦμα with the νοῦς?