It's easy to have faith when we like the way we see God working in our lives. But when we don't like His answers (or He just isn't offering them), those are the times we see our true faith. 

After Jesus' fed 4,000 people, Peter said He was the Christ. But when Jesus told them He would be killed, Peter argued with Him and Jesus called Him Satan. Peter flip flopped so fast he got two new names in five verses!

Believing in God's past goodness isn't faith. That's observation.

Faith is believing God is good even if the next phase of His plan is scarier than we could have imagined. It's remembering He is good when the scary part is actually happening. And it's relying on His grace to comfort us for as long as He allows the pain to last. 

It's not easy. Not at all. When things really got hard, Peter tripled down on denying he even knew Jesus. And this is the man Jesus tasked with building the church. 

I think He understands how difficult it is for us. But it's pleasing to Him. And that's all the reason real faith needs.