The idea of God came to fight for the Israelites and carries them all the way through into the promise land is overwhelming. He's not just up there watching them struggling but he involves! Therefore when we look back in our lives, isn't God carrying us through until now in the midst of difficulties and uncertainties?
In another occasion in Isaiah 30, the Israelites went to seek refuge and protection from Pharaoh in Egypt instead of asking God for direction. Yet God says, "In returning and rest you shall be saved; In quietness and trust shall be your strength." Isa 30:15
My understanding for this verse is to repent and rest in his promises, and be calm in our soul while waiting upon him in trust we are strengthened. And one day we shall weep no more (Isa 30:19), and he will be gracious to us that as soon as he hears our cry, he answers us, and though he gives us the bread of adversity and the water of affliction, yet he will hide himself no more but our eyes shall see him.
Jesus says Matthew 11:28 'Come to me, all who labor and are heavy laden, and I will give you rest. Take my yoke upon you, and learn from me, for I am gentle and lowly in heart, and you will find rest for your souls. For my yoke is easy, and my burden is light.'
May our eyes be opened and find rest in His Truth. Amen