One of the seven realities of experiencing God is that God's invitation for you to work with Him always leads you to a crisis of belief that requires faith and action. This is because often times when God calls us to do something it requires faith. If we trust in our own ability or skills we miss the point. God wants to do something that He gets the credit for not us. So, we have to decide like Moses did when he faced the burning bush if he would respond or not. Moses at first said that he was not eloquent of speech and started making excuses for why he wasn't the right person for the job. He experienced a crisis. But, eventually he was faithful to do it.
I would take issue with the "always" I bolded above.
I don't dispute for a minute that God
sometimes calls us to do things that appear to be humanly impossible. I've personally seen a few things work through in ways that were unexpected, to say the least. There are obviously times that God works in a situation in a way that leaves no doubt at all that God is due the praise rather than us. Like Moses, like endless battles in the Old Testament, and like many situations today.
At the same time I don't see any reason why God shouldn't call us to something that is within our own capabilities and bless us accordingly. When I got that sense that maybe I could help teach the kids the issue wasn't a question of whether I was capable of it, it was more a question of whether I wanted to do it. Having decided to step out (albeit a relatively small step) the blessings followed. Had I not taken that step the blessings wouldn't have come.
I don't doubt for a minute that the blessings that follow stepping out in absolute faith, attempting to do something that is impossible by just about any human measure, are abundantly greater. That doesn't in any way change the fact that we can also be blessed by taking initial small steps. Maybe the small steps are to prepare us for larger steps later, maybe they are just to fill a temporary need. For me agreeing to work with the kids at church it could be just a way of filling a gap pending another teacher. It could be a precursor to some kind of ministry, or it could just be that I'm going to teach the kids one week every month and nothing more. I'm sure God will show me the cards as and when I need to see them.