49. Spirit means the life of a regenerate person, the life called spiritual life:

Jesus (said), “...unless one is born of water and the spirit, he cannot enter the kingdom of God. (John 3:5)

I will give you a new heart and...a new spirit.... I will put My Spirit within you and cause you to walk in My statutes.... (Ezekiel 36:26-27)

(On giving a new) heart and...a new spirit.... (Ezekiel 11:19)

Create in me a clean heart, O God, and renew a steadfast spirit within me.... Restore to me the joy of Your salvation, and let a willing spirit uphold me. (Psalms 51:10-12)

...make yourselves a new heart and a new spirit. Why should you die, O house of Israel? (Ezekel 18:31)

You send forth Your Spirit, they are created; and You renew the face of the earth. (Psalms 104:30)

...the hour is coming, and now is, when the true worshipers will worship the Father in spirit and truth. (John 4:23)

(Jehovah God) gives breath to the people..., and spirit to those who walk on [the earth]. (Isaiah 42:5)

(Jehovah) forms the spirit of man within him. (Zechariah 12:1)

With my soul I have awaited You in the night..., with my spirit within me I have awaited You in the morning. (Isaiah 26:9)

In that day Jehovah...will be for a spirit of judgment to him who sits in judgment.... (Isaiah 28:5-6)

My spirit has rejoiced over God my Savior. (Luke 1:47)

...they have given my spirit rest in the north country. (Zechariah 6:8)

Into Your hand I commit my spirit; You have redeemed me.... (Psalms 31:5)

Did He not make them one, and the rest who had spirit [i.e., breath ]? (Malachi 2:15)

After three and a half days the spirit of life [i.e., the breath of life ] from God entered (the two witnesses slain by the beast). (Revelation 11:11)

(I, Jehovah,) the former of mountains, and the creator of spirit [i.e., the wind ].... (Amos 4:13)

O God, the God of the spirits as regards all flesh.... (Numbers 16:22, cf. 27:16)

I will pour out on the house of David and on the inhabitant of Jerusalem a spirit (from on high).... (Zechariah 12:10)

...until He has poured out upon us a spirit from on high.... (Isaiah 32:15)

...I will pour out water on the thirsty, and streams on dry ground; I will pour out My Spirit on your posterity.... (Isaiah 44:3)

...I will pour out My Spirit on all flesh.... Also on My menservants and maidservants in those days I will pour out My Spirit. (Joel 2:28-29)

To pour out the spirit means to regenerate. The same is meant by giving a new heart and a new spirit.

[2] Spirit means the spiritual life in people who are in a state of humility:

I dwell in...a contrite and humble spirit, to revive the spirit of the humble, and to revive the heart of the contrite. (Isaiah 57:15)

The sacrifices of God are a broken spirit; a broken and a contrite heart God does not spurn. (Psalms 51:17)

(He will) give them...the oil of joy instead of mourning, and a cloak of praise instead of a shrunken spirit. (Isaiah 61:3)

...a woman forsaken and afflicted in spirit.... (Isaiah 54:6)

Blessed are the poor in spirit, for theirs is the kingdom of heaven. (Matthew 5:3)