By realizing that He is your Father, you are his child, and by realizing and consciously focusing on the fact that your continuing existence, each heartbeat, each breath you take, is a grace from that loving Father. Learning to trust, in many cases, takes a life-changing illness, personal loss, or other physical danger. It accelerates the process if you are tested to the breaking point (not beyond), but I cannot say that you should ask for that. Allow the testing to be at God’s intensity and in His good time.
This is a bit off topic, but it makes me wonder how much our relationship with our earthly fathers affects our relationship with God. I have a good relationship with my father, but at the same time, my childhood memories of him have a definite sense that ultimately it was up to me to protect myself as best I could. I shouldn’t rely on my father because his main goal was to keep the peace. And I wonder how that affects my relationship with God sometimes - I try to obey, but I tend to have little sense of relying on God for anything.
Whenever I am able to choose so that my choice goes unnoticed, do I choose for myself what is worse? Do I keep in mind that minor discomforts, the lack of time, etc., are a consequence of poverty that I ought to accept with joy, offering them to the Lord?
Do I jump right into the unpleasant tasks so that the others don’t have to do them? Do I have a spirit of service that is habitual, generous, and without even interior complaint?
“…In our own home, in our office or workshop, is there not some person who is handicapped either physically or morally, who needs, perhaps urgently, our time, our affection and our attention?”
Do I use the ordinary events of the day - my setbacks, difficulties, struggles, work, interactions - to practice a particular virtue (humility, patience, cheerfulness, industriousness, charity, temperance, fortitude)?
Do I use these events to “step on” my pride, my vanity, my love of comfort?
Do I too frequently demand that I must know exactly how God is working in the world, or in some loved one, or in me? Is my trust in His work shaky and inconstant?
Have I recently formed a firm and concrete resolution to “trust God more”, perhaps by responding more habitually to the daily difficulties with a silent, confident, and child-like aspiration such as “I’m sure of You”?
Am I fully convinced that God wants me to work with Him in order to bring about great goodness in the world, especially right where He put me, here, now?
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