tonight, joel osteen sits down with abc's robin roberts for our series "faith matters." >> reporter:ight, 37,000 people packed into u.s. cellular field in chicago. not for a white sox baseball game, not for a concert. ♪ but to hear a message from this man.n. >> god's fighting our battle for us. >> reporter: pastor joel osteen. >> god wants you to be celebrated. >> reporter: head of the houston-based lakewood church. >> his message is always encouraging and positive. >> yes. >> i think for many years, people have heard that god's mad at them and they can't live up to the standards but our message is about the goodness of god and people come alive when they realize, god is for me. he's got a plan for my life and i can do something great. i can be who he wants me to be. you've got what it takes. this is your moment. the promise is in you. >> reporter: but that message draws fire fromm many main strem evangelical preachers. they believe h h offers an easy route to redemption that runs counter to what the bible says. why is it that some people feel it's wrong for a preacher to be a life c

there's more of the interview with joel osteen tonight on "nightline." he would think about all of the production. that's tonight on "nightline." >>> where's sam? >> where are you from? >> wichita, kansas. >> it has been so much fun hanging out with you guys for a few minutes and learning how to use the camera. that's a fancy contraption there. let's get to the boards -- what church? >> first baptist church, texas. >> near corpus christi. >> let's get to the boards and share with you as you get up this morning. how about a lightning shot out of redding, california. look at that. cloud-to-ground lightning. and out of oklahoma, that beauty shot, gorgeous. that's facebook and twitter. thank you for sending them uh from all over the country. oklahoma city, memphis, dallas, houston. it's a cooling trend. and in dallas, there's a big hallelujah, like choir singing, as you get below 100 degrees for the first time since the summer has been dragging on. warm along the eastern seaboard. hazy and humid in the deep south. but there's a big, cold blast of air making