Yet there is an infallible assurance of faith — the testimony of the Spirit of adoption witnessing with our spirits that we are the children of God. This "Spirit is the earnest of our inheritance, whereby we are sealed unto the day of redemption."
It is the duty of every one — to give all diligence to make his calling and election sure [so] that thereby his heart may be enlarged in peace and joy in the Holy Spirit, in love and thankfulness to God, and in strength and cheerfulness in the duties of obedience. True believers may have the assurance shaken. Indeed, they may even backslide. Yet still, such believers "are never utterly destitute of that seed of God and life of faith." And it is from this abiding seed of faith that -by the operation of the Spirit — this assurance may in due time be revived.
Before the fall, God the Father through His Word the Son — wrote His Law on Adam's heart; filled it with His Holy Spirit; and en-du-ed him with power and ability to keep God’s Law. For the Spirit of Christ then kept — and, among believers also today, keeps on subduing and enabling — the will of man to do that freely and cheerfully which the will of God, revealed in the Law, requires to be done. Indeed, the liberty of Christians is enlarged…in greater boldness of access to the throne of grace — and in fuller communications of the free Spirit of God than believers under the Law did ordinarily partake of.
Prayer, especially when public, may never be ecstatic. If vocal, it is to be expressed only "in a known tongue. For God is to be worshipped everywhere in spirit and in truth.
What, then, are the benefits which in this life do accompany or flow from justification, adoption and sanctification? Such are: the assurance of God's love; peace of conscience; joy in the Holy Ghost; increase of grace; and perseverance therein — till the very end of our earthly life.