Let us consider a while what that Spirit is.

He is the Spirit of love. For God is love; and He is the Spirit of God.
Of that there can be no doubt.

He is the Spirit of boundless love and charity, which is the Spirit of
the Father, and the Spirit of the Son likewise. For when by that Spirit
of love the Father sent the Son into the world that the world through Him
might be saved, then the Son, by the same Spirit of love, came into the
world, and humbled Himself, and took on Him the form of a slave, and was
obedient unto death, even the death of the Cross.

The Spirit of God, then, is the Spirit of love.

But the text describes this Spirit in different words. According to
Isaiah, the Spirit of the Lord is the spirit of wisdom and understanding,
the spirit of Counsel and might, the spirit of knowledge and of the fear
of the Lord--in one word, that I may put it as simply as I can--the
spirit of wisdom.

Now, is the spirit of wisdom the same as the spirit of love?

Sound theology, which is the highest reason, tells us that it must be so.
For consider:

If the spirit of love is the Spirit of God, and the spirit of wisdom is
the Spirit of God, then they must be the same spirit. For if they be two
different spirits, then there must be two Holy Spirits; for any and every
Spirit of God must be holy,--what else can He be? Unholy? I leave you