I explained it to you accurately. Please read these additional versions and translations to get a better idea. Something is being given first, next it
can be believed in. It's something granted as a privilege, but the act of believing is voluntary and a choice.
Philippians 1:29
New International Version
For it has been granted to you on behalf of Christ not only to believe in him, but also to suffer for him,
New Living Translation
For you have been given not only the privilege of trusting in Christ but also the privilege of suffering for him.
English Standard Version
For it has been granted to you that for the sake of Christ you should not only believe in him but also suffer for his sake,
Berean Standard Bible
For it has been granted to you on behalf of Christ not only to believe in Him, but also to suffer for Him,
Berean Literal Bible
For it has been granted to you concerning Christ, not only to believe in Him but also to suffer concerning Him,
King James Bible
For unto you it is given in the behalf of Christ, not only to believe on him, but also to suffer for his sake;
New King James Version
For to you it has been granted on behalf of Christ, not only to believe in Him, but also to suffer for His sake,