One is not in control, God is.
Love is the answer to "how" does one abandon one's self to God.
Do we not trust those who we love? More from Garrigou-Lagrange.
Once we have complied with the principles just laid down, when we have done all that the law of God and Christian prudence demand, our self-abandonment should then embrace everything. What does this involve? In the first place, our whole future, what our circumstances will be tomorrow, in twenty years and more. We must also abandon ourselves to God in all that concerns the present, in the midst of the difficulties we may be experiencing right now; even our past life, our past actions with all their consequences should be abandoned to the divine mercy.
We must likewise abandon ourselves to God in all that affects the body, in health and sickness, as well as in all that affects the soul, whether it be joy or tribulation, of long or brief duration. We must abandon ourselves to God in all that concerns the good will or malice of men. [58] Says St. Paul: [59]
If God be for us, who is against us? He that spared not His own Son, but delivered Him up for us all, how hath He not also, with Him, given us all things?... Who then shall separate us from the love of Christ? Shall tribulations? Or distress? Or famine? Or nakedness? Or danger? Or persecutions? Or the sword?... I am sure that neither death, nor life, nor angels, nor principalities, nor powers, nor things to come, nor might, nor height, nor depth, nor any other creature, shall be able to separate us from the love of God which is in Christ Jesus our Lord.
Could there be a more perfect self-abandonment in the spirit ; of faith, hope, and love? This is an abandonment embracing all the vicissitudes of this world, all the upheavals that may convulse it, embracing life and death, the hour of death, and the circumstances, peaceful or violent, in which we breathe forth our last sigh.
The same thought has been expressed in the psalms: "Fear the Lord... for there is no want to them that fear Him. The rich have wanted, and have suffered hunger: but they that seek the Lord shall not be deprived of any good (Ps. 33: 10) ; "0 how great is the multitude of Thy sweetness, O Lord, which Thou hast hidden for them that fear Thee! Which Thou hast wrought for them that hope in Thee.... Thou shalt hide them in the secret of Thy face from the disturbance of men. Thou shalt protect them in Thy tabernacle from the contradiction of tongues" (Ps. 30:20-21).