St. Vincent de Paul liked to give the example of Abraham as an example of perfect trust:

Do you remember that great Patriarch to whom God had promised to populate the whole earth with a son whom He had given him? And yet He commanded him to sacrifice his son to Him. Some might have said, “If Abraham kills his son, how will God fulfill His promise?” Nevertheless, this holy man, who had accustomed his spirit to submit to all the wills of God, was ready to carry out this order without worrying about the rest. It is up to God to figure it out, he could say; if I carry out His command, He will fulfill His promise. – But how? – I don’t know; it’s enough that He’s the Almighty, I’m going to offer Him what I hold dearest in the world, since He wants it. – But he is my only son? – No problem. – But, by taking the life of this child, I will take away the means for God to keep His word? – It is all one; He wishes it so, it must be done. – But if I keep him, my lineage will be blessed, God said so. – Yes, but He has also said that I should put him to death, He has made it clear to me; I will obey, whatever happens, and I will hope in His promises. – Admire this confidence: he does not worry at all about what will happen. But he hopes that all will be well, since God is involved. Why should we not have the same hope, if we leave to God the care of all that concerns us, and prefer what He commands us?

O my God! let us ask His divine goodness for great confidence in the happening of all that befalls us. Provided we are faithful to Him, nothing will fail us; He Himself will live in us; He will lead us; defend and love; what we say and what we do, all will be pleasing to Him.