In some cases, when people give this counsel they mean this: Don’t worry, God will eventually give you what want. God will come around to your way of thinking at some point. Hang in there and wait for God to answer (your way). He’ll take care of things (in a way that pleases you).
This is not trust.
To trust is to move to the stable conviction that whatever God decides to do is the right thing. It means being at peace with what He does, what He decides. It is to accept that God often acts in paradoxical ways, in ways that are different from, or even contrary to, our notions of what is best. God often permits evils for some greater good, even if this greater good is hidden from us.
At the foot of the cross, we realize that even a total disaster can produce immense good. We call that terrible day “Good Friday” for a reason. The apparent “total loss” of that day ushered in the New Covenant and made more than enough grace and mercy available to save the entire human race—if we but ask.
Many of us have experienced difficulties that were quite devastating to us at the time. In some cases, we have subsequently come to understand why God permitted them. We can see how we grew from the experience or how new opportunities were opened to us that, while not our preference at the time, were in fact best. In other cases, however, what went through still make little sense to us. But if we have learned to trust God, we can be at peace with His apparent “No” to our desired outcome. Trust says, “It is well with my soul.”
An old hymn with that title says,
When peace, like a river, attendeth my way,
when sorrows like sea billows roll;
whatever my lot, thou hast taught me to say,
It is well, it is well with my soul.
That is trust: the ability to say, “Whatever my lot, it is well with my soul.” It is not wrong to present our wants and wishes to God, but trusting Him means being at peace with His answer, not resenting it.
We are forever asking God to bless what we are doing, but when do we ever seek what God is blessing and then do that?
Trusting God doesn’t mean thinking that He’ll eventually give me what I want. Trusting God means being at peace with whatever He wants; knowing that He wants it is enough for me; there is peace and it is well with my soul.