No one can make a person believe in God, Jesus, or Joseph’s divine calling as a prophet in the latter days. And, no one can make a person not believe or stop believing. More clearly, you are responsible for your choice to believe or not to believe, and you can’t “blame” anyone for your choice. Evidence either way can’t be blamed, and arguments or the choices and examples of others can’t act upon you in a way that takes your agency away. Personal moral agency is too central to God’s plan to have Him force one of His children to be a believer in Him or to allow another person to force their will upon a son or daughter of our Heavenly Parents. Think about what is taught in Moses 4:3 regarding how protective God is of our ability to choose. Can you imagine God saying, “Here is some evidence that I won’t allow you to choose to ignore. I just made you a believer and you’ll get the consequences whether you like it or not…”? Also, can you image God saying, “Here is evidence that will make you a non-believer. You might want to be one, but I’m using this evidence to stop that, and to stop blessings you would otherwise be qualified to receive…”?
Once a person makes a choice–a purposeful agency-backed choice–there are possible and probable outcomes. If you choose to believe, you are now capable of receiving a confirmation from a source outside yourself. In other words, your choice to be a believer (and acting on that choice) qualifies you for a heavenly witness. For instance:
“…whosoever believeth on my words, them will I visit with the manifestation of my Spirit…” (D&C 5:16)
I have made the conscious decision to believe in God and prophets, and that decision, made over and over, day in and day out, has been confirmed by quiet manifestations of God’s Spirit. The promise in D&C 5 has come to pass in my life. There’s been very few remarkable or outstanding spiritual moments…just quiet manifestations that the choice to believe is the right one for me, and that I don’t believe in something that isn’t true. In other words, God is real.
With all of the evidence that proves that Heavenly Father exists, and all of the evidence that He does not, none have caused me, or anyone else, to have to believe or not to. I have chosen to believe, and have had His Spirit allow me to know things I couldn’t know based on evidence. We have Heavenly Parents, and God has called prophets in the last days.