27 The heart is viewed here as the seat of the psalmist’s motives and moral character.
28 Heb “and a reliable spirit renew in my inner being.”
29 Heb “do not cast me away from before you.”
30 Your Holy Spirit. The personal Spirit of God is mentioned frequently in the OT, but only here and in Isa 63:10–11 is he called “your/his Holy Spirit.”
31 Do not take … away. The psalmist expresses his fear that, due to his sin, God will take away the Holy Spirit from him. NT believers enjoy the permanent gift of the Holy Spirit and need not make such a request nor fear such a consequence. However, in the OT God’s Spirit empowered certain individuals for special tasks and only temporarily resided in them. For example, when God rejected Saul as king and chose David to replace him, the divine Spirit left Saul and came upon David (1 Sam 16:13–14).
32 Heb “and [with] a willing spirit sustain me.” The psalmist asks that God make him the kind of person who willingly obeys the divine commandments. The imperfect verbal form is used here to express the psalmist’s wish or request.

In other versions

Create in me a clean heart, O God,

and renew a right spirit within me.

Cast me not away from your presence,

and take not your Holy Spirit from me.

Restore to me the joy of your salvation,

and uphold me with a willing spirit.

Create in me a pure heart, O God,

and renew a steadfast spirit within me.

Do not cast me from your presence

or take your Holy Spirit from me.

Restore to me the joy of your salvation

and grant me a willing spirit, to sustain me.

God, create a clean heart for me

and renew a steadfast spirit within me.

Do not banish me from your presence

or take your Holy Spirit from me.

Restore the joy of your salvation to me,

and sustain me by giving me a willing spirit.

Create in me a clean heart, O God.

Renew a loyal spirit within me.

Do not banish me from your presence,

and don’t take your Holy Spirit from me.

Restore to me the joy of your salvation,

and make me willing to obey you.

Create a clean heart for me, O God,

and renew a steadfast spirit within me.

Do not cast me away from your presence,

and do not take your Holy Spirit from me.

Restore to me the joy of your salvation,

and with a willing spirit sustain me.

Create in me a clean heart, O God;

And renew a right spirit within me.

Cast me not away from thy presence;

And take not thy holy spirit from me.

Restore unto me the joy of thy salvation;

And uphold me with thy free spirit.

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