I don’t think it’s needed, but I think it’s better to leave it.
Many magazines already have an established objective. If that objective has been stated in the past, it might be a good idea to use the same wording as before. This is typically something decided by consensus and should not be changed without further consensus.
Also, you might want to double check your pronouns. The use of ‘our’ and ‘their’ is a little awkward. The ‘magazine’ and ‘platform’ are inanimate. ‘Our’ refers to the people, not the magazine. ‘Their’ refers to another pronoun, ‘our’. This all makes it kind of awkward.
As I understand it, it’s the believers’ experiences that encourage others.