We can sing about it, we can talk to people about it, but when it comes to the crux of the matter and you're standing in a situation where uncertainty looks you in the eye, you have to practice it. You need to practice trust.
How do you do that? You need to stand on His word. Declare it daily and don't accept anything else that isn't His word. Trust in His timing. Trust in His healing hand. Trust in the Cross. Jesus has forgiven our sin, giving us freedom, healed our sicknesses and didn't abandon us, but gave us the Holy Spirit. Be still and know that He is God.
Pray: God I thank you for your Son. I thank you that in Christ I have everything. Lord, help me to trust in you. Help me to leave every challenge and circumstance in front of me at the foot of the cross. Lord I thank you that you hear my prayer and that no lie of the enemy will waver my trust. Amen.
For me, this sums it up and brings me peace:
O Lord Almighty, blessed is the man who trusts in you.