If we walk closely with the Lord then, to some extent, all circumstances refine our faith. This is the walk of faith, where each decision is considered after specific or general pray and meditation, on God, on His Word and on His great works. When we are tested through difficult circumstances, it seems like we are pushed to a limit, which more than encourages - even forces us - us to turn to God and submit to His ways, always trusting Him.
In my case, moving from an unpleasant situation in a large company, where life became very difficult, I started my own business. This brought much uncertainty and a 'big unknown' to me but I realised that God is not surprised by anything so it became a matter of much prayer and trying to centre myself and submit to Him. It required surrender, as taught to me, when things did not go as smoothly as expected. All the way through the difficulties of starting one's own business, while I did not always get what I wanted, the Lord provided encouragement along the way through many people who came across my path. He is able; He is faithful. As a results of this, I feel that I know him better and that my daily communication and communion with Him is closer. I have developed more confidence in that I am able to say, with some excitement in my heart, "Lord, I wonder what you are doing now?" when things look like they are going bad, instead of worrying in case I get hurt or loose out somehow.
To me, God is glorified in our weakness. When we are weak or incapable of doing something and God brings it about, He is glorified, not us. When we are tested and feel vulnerable and perhaps not succeeding in what we are endeavouring to do, and the result is positive, the results can only be ascribed to God and He is glorified. In all my attemps at finding work in my own business, much of it came through other's approaching me, not me, them. I realised and so did my familiy realise that God was at work and it was He who should be recognised and receive the glory; not me. He must receive all the glory! That means I have to get out of teh way, lest I or anyone else start applauding me above God.