asalamunalaikum..I dont understand predestination.In shia islam we dont beleive in predestination but what about the hadith " what is destined for you will reach you even if it is between two mountains and what is not destined will not reach even if it is between two lips "

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Walaikumussalam
But it is associated with your effort and action if effort not made you will not get if made then you will get .
Wassalam