Today I will give you two instructions from Thomas Watson as found in his book A Body of Divinity; to see the Trinity through the eyes of faith and to trust in God's providence.
The Trinity is solely an object of faith; the plumbline of reason is too short to fathom this mystery. But where reason cannot wade—there faith may swim! There are some truths in religion that may be demonstrated by reason; as that there is a God. But the Trinity of persons in the Unity of essence, is wholly supernatural, and must be believed by faith. This sacred doctrine is not against reason—but above it. Those illuminated philosophers, who could find out the causes of things, and discourse of the magnitude and influence of the stars, the nature of minerals; could never, by their deepest search, find out the mystery of the Trinity. This is of divine revelation, and must be adored with humble faith. (112)
God is to be trusted when his providences seem to run contrary to his promises. God promised to give David the crown, to make him king; but providence ran contrary to his promise. David was pursued by Saul, and was in danger of his life—but all this while it was David's duty to trust God. Pray observe, that the Lord by cross providences, often brings to pass his promise. God promised Paul the lives of all who were with him in the ship; but the providence of God seemed to run quite contrary to his promise, for the winds blew, the ship split and broke in pieces. Thus God fulfilled his promise—upon the broken pieces of the ship they all came safe to shore. Trust God when providences seem to run quite contrary to promises. (123)