Sanctification is an immediate work of the Spirit of God on the
souls of believers, purifying and cleansing of their natures from
the pollution and uncleanness of sin, renewing in them the image
of God, and therefore enabling them, from a spiritual and habitual
principle of grace, to yield obedience unto God, according unto the
tenor and terms of the new covenant, by virtue of the life and death
of Jesus Christ.
-John Owen, Works, Vol. 3, The Holy Spirit, p. 386

What glorious words.

And…

And they who of themselves can do nothing, – that is, in a way of living unto God,-
cannot of themselves preserve grace, act it, and increase it; which are
the greatest things we do or are wrought in us in this world.
Wherefore God hath, in infinite wisdom, so ordered the dispensation of his
love and grace unto believers, that all of them living upon the continual
supplies of his Spirit, none may have cause, on the one hand,
to faint or despond, nor occasion, on the other, unto self-confidence
or elation of mind; that so “no flesh may glory in itself, but he that
glorieth may glory in the Lord.”  And, therefore, as he greatly
encourageth the weak, the fearful, the faint, the disconsolate and
dejected, and that by the engagement of all the holy properties of
his nature in and unto their assistance, Isaiah 35:3-6, 40:27-31; so
he warns them who suppose themselves strong, steadfast, and immovable,
“not to be high-minded, but to fear,” Romans 11:20, because
the whole issue of things depends on his sovereign supplies of grace.
-John Owen, Works, Vol. 3, The Holy Spirit, p. 394

What beautiful, wonderful words.  Might I ponder on such things this night.