If we say that we trust in God, then it would mean that we must have a firm faith.
To have a firm faith would also mean that we understand the ways of God.
And indeed, the ways of God can be quite a mystery to us.
Because the mysterious ways of God can be difficult to understand, as well as difficult to follow.
In the 1st reading, Abram was getting anxious about when the promise of God would be fulfilled.
God promised him a son, his own flesh and blood, but he had waited and waited, and he had to ask God about it.
Then, God took him outside and said: Look up to heaven and count the stars if you can.
Of course, counting the stars would be quite impossible, even with modern technology.
So, that would already tell us of our human limitations when it comes to creation and nature.
And the posture of looking up tells us that God is our Creator and we are His creation.
So, we have to humble ourselves and to accept the mysterious ways of God and His authority over us.
When we submit to God, then He can be our shield, and in God, our reward for trusting in His ways will be great.