Jesus: I am the way, the truth and the light. Nobody comes to the Father except through me" (John 14:6)
When God sends Mary (or another saint, or an angel) on a mission to do His will here on earth in our own day, the same things apply. I marvel at how people can come to the conclusion that such things can't be from God, as if God always acts directly in mediating our affairs. Scriptural examples of His use of secondary intermediaries abound. Quoting John 14:6 is entirely irrelevant. Heeding Mary, when she is sent to us on a "mission from God," is coming to the Father through Jesus.
**Jesus: I am the way, the truth and the light. Nobody comes to the Father except through me” (John 14:6) **
And that is exactly where Our Lady of Fatima sends us — straight to the Son.