If you say that one religion is the best - you speak for God. If you can say that a religion is best for you - God has spoken to you.
Well put.
Great quote for someone into self-deception.
For those who are not:
We are therefore Christ's ambassadors, as though God were making his appeal through us. We implore you on Christ's behalf: Be reconciled to God. (2 Corinthians 5:20)