The worst position one can be in on earth is to think you're right with God when you're not.

The second worst position is like unto it and that is to think you're wrong with God when you're not.

Satan delights in either one. He delights in deceiving millions of "Christians" into believing that church attendance is basically all that's required of them as Christians.  Just show up faithfully and listen to endless sermons and God is happy with them.

But he also loves to target souls who are pleasing to God and convince them God isn't pleased with them, that something's wrong, that they're not doing enough, etc.

Saint - only the Holy Spirit can reveal our Father's mind and heart, if He's pleased with you or not - He will know. Our part is to "examine ourselves daily to see if we're walking in faith", genuine faith. It takes no faith whatsoever to sit in a pew and listen to a sermon - this appeals to the intellect (the soul) but does nothing for the spirit. Endless sermons do not build real faith, only the pseudo faith most churches call real faith. Singing songs does not require faith. You can sing loudly and proudly for all to hear while your heart is far from him.

It takes great faith to step out and start becoming a doer of The Word, following Christ daily into Divine encounters the Holy Spirit will arrange for you. It takes great faith to go into all the world and preach the Gospel with signs and wonders following. 

Dead religion or a living faith that engages God daily, whenever and wherever you happen to be  - the choice is yours. One choice requires you to sacrifice nothing. The other requires you to sacrifice everything  - indeed, your very life for His kingdom's sake, to fulfill the Father's will.....

Selah.