Just love your kids as much as you can, give advise to all the bad times and how to handle them. I would leave religion out of it and let them make up there own minds on what to believe, its up to you. But give advise and be there for them.

For your dad, Its true what tatt said, if he doesn't respect your opinion.. oh well. But  they are your children. Do what you think is right for them not what your father says. You have more exp with your kids than pappi does.

Sincerely,

dls